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| author | Anton Luka Šijanec <anton@sijanec.eu> | 2024-05-27 13:08:29 +0200 |
|---|---|---|
| committer | Anton Luka Šijanec <anton@sijanec.eu> | 2024-05-27 13:08:29 +0200 |
| commit | 75160b12821f7f4299cce7f0b69c83c1502ae071 (patch) | |
| tree | 27e25e4ccaef45f0c58b22831164050d1af1d4db /vendor/markbaker/matrix/classes | |
| parent | prvi-commit (diff) | |
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Diffstat (limited to 'vendor/markbaker/matrix/classes')
30 files changed, 2329 insertions, 0 deletions
diff --git a/vendor/markbaker/matrix/classes/src/Builder.php b/vendor/markbaker/matrix/classes/src/Builder.php new file mode 100644 index 0000000..d075479 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Builder.php @@ -0,0 +1,70 @@ +<?php
+
+/**
+ *
+ * Class for the creating "special" Matrices
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Matrix Builder class.
+ *
+ * @package Matrix
+ */
+class Builder
+{
+ /**
+ * Create a new matrix of specified dimensions, and filled with a specified value
+ * If the column argument isn't provided, then a square matrix will be created
+ *
+ * @param mixed $fillValue
+ * @param int $rows
+ * @param int|null $columns
+ * @return Matrix
+ * @throws Exception
+ */
+ public static function createFilledMatrix($fillValue, $rows, $columns = null)
+ {
+ if ($columns === null) {
+ $columns = $rows;
+ }
+
+ $rows = Matrix::validateRow($rows);
+ $columns = Matrix::validateColumn($columns);
+
+ return new Matrix(
+ array_fill(
+ 0,
+ $rows,
+ array_fill(
+ 0,
+ $columns,
+ $fillValue
+ )
+ )
+ );
+ }
+
+ /**
+ * Create a new identity matrix of specified dimensions
+ * This will always be a square matrix, with the number of rows and columns matching the provided dimension
+ *
+ * @param int $dimensions
+ * @return Matrix
+ * @throws Exception
+ */
+ public static function createIdentityMatrix($dimensions, $fillValue = null)
+ {
+ $grid = static::createFilledMatrix($fillValue, $dimensions)->toArray();
+
+ for ($x = 0; $x < $dimensions; ++$x) {
+ $grid[$x][$x] = 1;
+ }
+
+ return new Matrix($grid);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Decomposition/Decomposition.php b/vendor/markbaker/matrix/classes/src/Decomposition/Decomposition.php new file mode 100644 index 0000000..d4e76f9 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Decomposition/Decomposition.php @@ -0,0 +1,27 @@ +<?php
+
+namespace Matrix\Decomposition;
+
+use Matrix\Exception;
+use Matrix\Matrix;
+
+class Decomposition
+{
+ const LU = 'LU';
+ const QR = 'QR';
+
+ /**
+ * @throws Exception
+ */
+ public static function decomposition($type, Matrix $matrix)
+ {
+ switch (strtoupper($type)) {
+ case self::LU:
+ return new LU($matrix);
+ case self::QR:
+ return new QR($matrix);
+ default:
+ throw new Exception('Invalid Decomposition');
+ }
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Decomposition/LU.php b/vendor/markbaker/matrix/classes/src/Decomposition/LU.php new file mode 100644 index 0000000..0a92ed0 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Decomposition/LU.php @@ -0,0 +1,260 @@ +<?php
+
+namespace Matrix\Decomposition;
+
+use Matrix\Exception;
+use Matrix\Matrix;
+
+class LU
+{
+ private $luMatrix;
+ private $rows;
+ private $columns;
+
+ private $pivot = [];
+
+ public function __construct(Matrix $matrix)
+ {
+ $this->luMatrix = $matrix->toArray();
+ $this->rows = $matrix->rows;
+ $this->columns = $matrix->columns;
+
+ $this->buildPivot();
+ }
+
+ /**
+ * Get lower triangular factor.
+ *
+ * @return Matrix Lower triangular factor
+ */
+ public function getL(): Matrix
+ {
+ $lower = [];
+
+ $columns = min($this->rows, $this->columns);
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $columns; ++$column) {
+ if ($row > $column) {
+ $lower[$row][$column] = $this->luMatrix[$row][$column];
+ } elseif ($row === $column) {
+ $lower[$row][$column] = 1.0;
+ } else {
+ $lower[$row][$column] = 0.0;
+ }
+ }
+ }
+
+ return new Matrix($lower);
+ }
+
+ /**
+ * Get upper triangular factor.
+ *
+ * @return Matrix Upper triangular factor
+ */
+ public function getU(): Matrix
+ {
+ $upper = [];
+
+ $rows = min($this->rows, $this->columns);
+ for ($row = 0; $row < $rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ if ($row <= $column) {
+ $upper[$row][$column] = $this->luMatrix[$row][$column];
+ } else {
+ $upper[$row][$column] = 0.0;
+ }
+ }
+ }
+
+ return new Matrix($upper);
+ }
+
+ /**
+ * Return pivot permutation vector.
+ *
+ * @return Matrix Pivot matrix
+ */
+ public function getP(): Matrix
+ {
+ $pMatrix = [];
+
+ $pivots = $this->pivot;
+ $pivotCount = count($pivots);
+ foreach ($pivots as $row => $pivot) {
+ $pMatrix[$row] = array_fill(0, $pivotCount, 0);
+ $pMatrix[$row][$pivot] = 1;
+ }
+
+ return new Matrix($pMatrix);
+ }
+
+ /**
+ * Return pivot permutation vector.
+ *
+ * @return array Pivot vector
+ */
+ public function getPivot(): array
+ {
+ return $this->pivot;
+ }
+
+ /**
+ * Is the matrix nonsingular?
+ *
+ * @return bool true if U, and hence A, is nonsingular
+ */
+ public function isNonsingular(): bool
+ {
+ for ($diagonal = 0; $diagonal < $this->columns; ++$diagonal) {
+ if ($this->luMatrix[$diagonal][$diagonal] === 0.0) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ private function buildPivot(): void
+ {
+ for ($row = 0; $row < $this->rows; ++$row) {
+ $this->pivot[$row] = $row;
+ }
+
+ for ($column = 0; $column < $this->columns; ++$column) {
+ $luColumn = $this->localisedReferenceColumn($column);
+
+ $this->applyTransformations($column, $luColumn);
+
+ $pivot = $this->findPivot($column, $luColumn);
+ if ($pivot !== $column) {
+ $this->pivotExchange($pivot, $column);
+ }
+
+ $this->computeMultipliers($column);
+
+ unset($luColumn);
+ }
+ }
+
+ private function localisedReferenceColumn($column): array
+ {
+ $luColumn = [];
+
+ for ($row = 0; $row < $this->rows; ++$row) {
+ $luColumn[$row] = &$this->luMatrix[$row][$column];
+ }
+
+ return $luColumn;
+ }
+
+ private function applyTransformations($column, array $luColumn): void
+ {
+ for ($row = 0; $row < $this->rows; ++$row) {
+ $luRow = $this->luMatrix[$row];
+ // Most of the time is spent in the following dot product.
+ $kmax = min($row, $column);
+ $sValue = 0.0;
+ for ($kValue = 0; $kValue < $kmax; ++$kValue) {
+ $sValue += $luRow[$kValue] * $luColumn[$kValue];
+ }
+ $luRow[$column] = $luColumn[$row] -= $sValue;
+ }
+ }
+
+ private function findPivot($column, array $luColumn): int
+ {
+ $pivot = $column;
+ for ($row = $column + 1; $row < $this->rows; ++$row) {
+ if (abs($luColumn[$row]) > abs($luColumn[$pivot])) {
+ $pivot = $row;
+ }
+ }
+
+ return $pivot;
+ }
+
+ private function pivotExchange($pivot, $column): void
+ {
+ for ($kValue = 0; $kValue < $this->columns; ++$kValue) {
+ $tValue = $this->luMatrix[$pivot][$kValue];
+ $this->luMatrix[$pivot][$kValue] = $this->luMatrix[$column][$kValue];
+ $this->luMatrix[$column][$kValue] = $tValue;
+ }
+
+ $lValue = $this->pivot[$pivot];
+ $this->pivot[$pivot] = $this->pivot[$column];
+ $this->pivot[$column] = $lValue;
+ }
+
+ private function computeMultipliers($diagonal): void
+ {
+ if (($diagonal < $this->rows) && ($this->luMatrix[$diagonal][$diagonal] != 0.0)) {
+ for ($row = $diagonal + 1; $row < $this->rows; ++$row) {
+ $this->luMatrix[$row][$diagonal] /= $this->luMatrix[$diagonal][$diagonal];
+ }
+ }
+ }
+
+ private function pivotB(Matrix $B): array
+ {
+ $X = [];
+ foreach ($this->pivot as $rowId) {
+ $row = $B->getRows($rowId + 1)->toArray();
+ $X[] = array_pop($row);
+ }
+
+ return $X;
+ }
+
+ /**
+ * Solve A*X = B.
+ *
+ * @param Matrix $B a Matrix with as many rows as A and any number of columns
+ *
+ * @throws Exception
+ *
+ * @return Matrix X so that L*U*X = B(piv,:)
+ */
+ public function solve(Matrix $B): Matrix
+ {
+ if ($B->rows !== $this->rows) {
+ throw new Exception('Matrix row dimensions are not equal');
+ }
+
+ if ($this->rows !== $this->columns) {
+ throw new Exception('LU solve() only works on square matrices');
+ }
+
+ if (!$this->isNonsingular()) {
+ throw new Exception('Can only perform operation on singular matrix');
+ }
+
+ // Copy right hand side with pivoting
+ $nx = $B->columns;
+ $X = $this->pivotB($B);
+
+ // Solve L*Y = B(piv,:)
+ for ($k = 0; $k < $this->columns; ++$k) {
+ for ($i = $k + 1; $i < $this->columns; ++$i) {
+ for ($j = 0; $j < $nx; ++$j) {
+ $X[$i][$j] -= $X[$k][$j] * $this->luMatrix[$i][$k];
+ }
+ }
+ }
+
+ // Solve U*X = Y;
+ for ($k = $this->columns - 1; $k >= 0; --$k) {
+ for ($j = 0; $j < $nx; ++$j) {
+ $X[$k][$j] /= $this->luMatrix[$k][$k];
+ }
+ for ($i = 0; $i < $k; ++$i) {
+ for ($j = 0; $j < $nx; ++$j) {
+ $X[$i][$j] -= $X[$k][$j] * $this->luMatrix[$i][$k];
+ }
+ }
+ }
+
+ return new Matrix($X);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Decomposition/QR.php b/vendor/markbaker/matrix/classes/src/Decomposition/QR.php new file mode 100644 index 0000000..93bf414 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Decomposition/QR.php @@ -0,0 +1,191 @@ +<?php
+
+namespace Matrix\Decomposition;
+
+use Matrix\Exception;
+use Matrix\Matrix;
+
+class QR
+{
+ private $qrMatrix;
+ private $rows;
+ private $columns;
+
+ private $rDiagonal = [];
+
+ public function __construct(Matrix $matrix)
+ {
+ $this->qrMatrix = $matrix->toArray();
+ $this->rows = $matrix->rows;
+ $this->columns = $matrix->columns;
+
+ $this->decompose();
+ }
+
+ public function getHouseholdVectors(): Matrix
+ {
+ $householdVectors = [];
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ if ($row >= $column) {
+ $householdVectors[$row][$column] = $this->qrMatrix[$row][$column];
+ } else {
+ $householdVectors[$row][$column] = 0.0;
+ }
+ }
+ }
+
+ return new Matrix($householdVectors);
+ }
+
+ public function getQ(): Matrix
+ {
+ $qGrid = [];
+
+ $rowCount = $this->rows;
+ for ($k = $this->columns - 1; $k >= 0; --$k) {
+ for ($i = 0; $i < $this->rows; ++$i) {
+ $qGrid[$i][$k] = 0.0;
+ }
+ $qGrid[$k][$k] = 1.0;
+ if ($this->columns > $this->rows) {
+ $qGrid = array_slice($qGrid, 0, $this->rows);
+ }
+
+ for ($j = $k; $j < $this->columns; ++$j) {
+ if (isset($this->qrMatrix[$k], $this->qrMatrix[$k][$k]) && $this->qrMatrix[$k][$k] != 0.0) {
+ $s = 0.0;
+ for ($i = $k; $i < $this->rows; ++$i) {
+ $s += $this->qrMatrix[$i][$k] * $qGrid[$i][$j];
+ }
+ $s = -$s / $this->qrMatrix[$k][$k];
+ for ($i = $k; $i < $this->rows; ++$i) {
+ $qGrid[$i][$j] += $s * $this->qrMatrix[$i][$k];
+ }
+ }
+ }
+ }
+
+ array_walk(
+ $qGrid,
+ function (&$row) use ($rowCount) {
+ $row = array_reverse($row);
+ $row = array_slice($row, 0, $rowCount);
+ }
+ );
+
+ return new Matrix($qGrid);
+ }
+
+ public function getR(): Matrix
+ {
+ $rGrid = [];
+
+ for ($row = 0; $row < $this->columns; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ if ($row < $column) {
+ $rGrid[$row][$column] = $this->qrMatrix[$row][$column] ?? 0.0;
+ } elseif ($row === $column) {
+ $rGrid[$row][$column] = $this->rDiagonal[$row] ?? 0.0;
+ } else {
+ $rGrid[$row][$column] = 0.0;
+ }
+ }
+ }
+
+ if ($this->columns > $this->rows) {
+ $rGrid = array_slice($rGrid, 0, $this->rows);
+ }
+
+ return new Matrix($rGrid);
+ }
+
+ private function hypo($a, $b): float
+ {
+ if (abs($a) > abs($b)) {
+ $r = $b / $a;
+ $r = abs($a) * sqrt(1 + $r * $r);
+ } elseif ($b != 0.0) {
+ $r = $a / $b;
+ $r = abs($b) * sqrt(1 + $r * $r);
+ } else {
+ $r = 0.0;
+ }
+
+ return $r;
+ }
+
+ /**
+ * QR Decomposition computed by Householder reflections.
+ */
+ private function decompose(): void
+ {
+ for ($k = 0; $k < $this->columns; ++$k) {
+ // Compute 2-norm of k-th column without under/overflow.
+ $norm = 0.0;
+ for ($i = $k; $i < $this->rows; ++$i) {
+ $norm = $this->hypo($norm, $this->qrMatrix[$i][$k]);
+ }
+ if ($norm != 0.0) {
+ // Form k-th Householder vector.
+ if ($this->qrMatrix[$k][$k] < 0.0) {
+ $norm = -$norm;
+ }
+ for ($i = $k; $i < $this->rows; ++$i) {
+ $this->qrMatrix[$i][$k] /= $norm;
+ }
+ $this->qrMatrix[$k][$k] += 1.0;
+ // Apply transformation to remaining columns.
+ for ($j = $k + 1; $j < $this->columns; ++$j) {
+ $s = 0.0;
+ for ($i = $k; $i < $this->rows; ++$i) {
+ $s += $this->qrMatrix[$i][$k] * $this->qrMatrix[$i][$j];
+ }
+ $s = -$s / $this->qrMatrix[$k][$k];
+ for ($i = $k; $i < $this->rows; ++$i) {
+ $this->qrMatrix[$i][$j] += $s * $this->qrMatrix[$i][$k];
+ }
+ }
+ }
+ $this->rDiagonal[$k] = -$norm;
+ }
+ }
+
+ public function isFullRank(): bool
+ {
+ for ($j = 0; $j < $this->columns; ++$j) {
+ if ($this->rDiagonal[$j] == 0.0) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ /**
+ * Least squares solution of A*X = B.
+ *
+ * @param Matrix $B a Matrix with as many rows as A and any number of columns
+ *
+ * @throws Exception
+ *
+ * @return Matrix matrix that minimizes the two norm of Q*R*X-B
+ */
+ public function solve(Matrix $B): Matrix
+ {
+ if ($B->rows !== $this->rows) {
+ throw new Exception('Matrix row dimensions are not equal');
+ }
+
+ if (!$this->isFullRank()) {
+ throw new Exception('Can only perform this operation on a full-rank matrix');
+ }
+
+ // Compute Y = transpose(Q)*B
+ $Y = $this->getQ()->transpose()
+ ->multiply($B);
+ // Solve R*X = Y;
+ return $this->getR()->inverse()
+ ->multiply($Y);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Div0Exception.php b/vendor/markbaker/matrix/classes/src/Div0Exception.php new file mode 100644 index 0000000..4cb51d6 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Div0Exception.php @@ -0,0 +1,13 @@ +<?php
+
+/**
+ * Exception.
+ *
+ * @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+namespace Matrix;
+
+class Div0Exception extends Exception
+{
+}
diff --git a/vendor/markbaker/matrix/classes/src/Exception.php b/vendor/markbaker/matrix/classes/src/Exception.php new file mode 100644 index 0000000..da684b3 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Exception.php @@ -0,0 +1,13 @@ +<?php
+
+/**
+ * Exception.
+ *
+ * @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+namespace Matrix;
+
+class Exception extends \Exception
+{
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions.php b/vendor/markbaker/matrix/classes/src/Functions.php new file mode 100644 index 0000000..fe7d11c --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions.php @@ -0,0 +1,337 @@ +<?php
+
+namespace Matrix;
+
+class Functions
+{
+ /**
+ * Calculate the adjoint of the matrix
+ *
+ * @param Matrix $matrix The matrix whose adjoint we wish to calculate
+ * @return Matrix
+ *
+ * @throws Exception
+ */
+ private static function getAdjoint(Matrix $matrix)
+ {
+ return self::transpose(
+ self::getCofactors($matrix)
+ );
+ }
+
+ /**
+ * Return the adjoint of this matrix
+ * The adjugate, classical adjoint, or adjunct of a square matrix is the transpose of its cofactor matrix.
+ * The adjugate has sometimes been called the "adjoint", but today the "adjoint" of a matrix normally refers
+ * to its corresponding adjoint operator, which is its conjugate transpose.
+ *
+ * @param Matrix $matrix The matrix whose adjoint we wish to calculate
+ * @return Matrix
+ * @throws Exception
+ **/
+ public static function adjoint(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Adjoint can only be calculated for a square matrix');
+ }
+
+ return self::getAdjoint($matrix);
+ }
+
+ /**
+ * Calculate the cofactors of the matrix
+ *
+ * @param Matrix $matrix The matrix whose cofactors we wish to calculate
+ * @return Matrix
+ *
+ * @throws Exception
+ */
+ private static function getCofactors(Matrix $matrix)
+ {
+ $cofactors = self::getMinors($matrix);
+ $dimensions = $matrix->rows;
+
+ $cof = 1;
+ for ($i = 0; $i < $dimensions; ++$i) {
+ $cofs = $cof;
+ for ($j = 0; $j < $dimensions; ++$j) {
+ $cofactors[$i][$j] *= $cofs;
+ $cofs = -$cofs;
+ }
+ $cof = -$cof;
+ }
+
+ return new Matrix($cofactors);
+ }
+
+ /**
+ * Return the cofactors of this matrix
+ *
+ * @param Matrix $matrix The matrix whose cofactors we wish to calculate
+ * @return Matrix
+ *
+ * @throws Exception
+ */
+ public static function cofactors(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Cofactors can only be calculated for a square matrix');
+ }
+
+ return self::getCofactors($matrix);
+ }
+
+ /**
+ * @param Matrix $matrix
+ * @param int $row
+ * @param int $column
+ * @return float
+ * @throws Exception
+ */
+ private static function getDeterminantSegment(Matrix $matrix, $row, $column)
+ {
+ $tmpMatrix = $matrix->toArray();
+ unset($tmpMatrix[$row]);
+ array_walk(
+ $tmpMatrix,
+ function (&$row) use ($column) {
+ unset($row[$column]);
+ }
+ );
+
+ return self::getDeterminant(new Matrix($tmpMatrix));
+ }
+
+ /**
+ * Calculate the determinant of the matrix
+ *
+ * @param Matrix $matrix The matrix whose determinant we wish to calculate
+ * @return float
+ *
+ * @throws Exception
+ */
+ private static function getDeterminant(Matrix $matrix)
+ {
+ $dimensions = $matrix->rows;
+ $determinant = 0;
+
+ switch ($dimensions) {
+ case 1:
+ $determinant = $matrix->getValue(1, 1);
+ break;
+ case 2:
+ $determinant = $matrix->getValue(1, 1) * $matrix->getValue(2, 2) -
+ $matrix->getValue(1, 2) * $matrix->getValue(2, 1);
+ break;
+ default:
+ for ($i = 1; $i <= $dimensions; ++$i) {
+ $det = $matrix->getValue(1, $i) * self::getDeterminantSegment($matrix, 0, $i - 1);
+ if (($i % 2) == 0) {
+ $determinant -= $det;
+ } else {
+ $determinant += $det;
+ }
+ }
+ break;
+ }
+
+ return $determinant;
+ }
+
+ /**
+ * Return the determinant of this matrix
+ *
+ * @param Matrix $matrix The matrix whose determinant we wish to calculate
+ * @return float
+ * @throws Exception
+ **/
+ public static function determinant(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Determinant can only be calculated for a square matrix');
+ }
+
+ return self::getDeterminant($matrix);
+ }
+
+ /**
+ * Return the diagonal of this matrix
+ *
+ * @param Matrix $matrix The matrix whose diagonal we wish to calculate
+ * @return Matrix
+ * @throws Exception
+ **/
+ public static function diagonal(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Diagonal can only be extracted from a square matrix');
+ }
+
+ $dimensions = $matrix->rows;
+ $grid = Builder::createFilledMatrix(0, $dimensions, $dimensions)
+ ->toArray();
+
+ for ($i = 0; $i < $dimensions; ++$i) {
+ $grid[$i][$i] = $matrix->getValue($i + 1, $i + 1);
+ }
+
+ return new Matrix($grid);
+ }
+
+ /**
+ * Return the antidiagonal of this matrix
+ *
+ * @param Matrix $matrix The matrix whose antidiagonal we wish to calculate
+ * @return Matrix
+ * @throws Exception
+ **/
+ public static function antidiagonal(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Anti-Diagonal can only be extracted from a square matrix');
+ }
+
+ $dimensions = $matrix->rows;
+ $grid = Builder::createFilledMatrix(0, $dimensions, $dimensions)
+ ->toArray();
+
+ for ($i = 0; $i < $dimensions; ++$i) {
+ $grid[$i][$dimensions - $i - 1] = $matrix->getValue($i + 1, $dimensions - $i);
+ }
+
+ return new Matrix($grid);
+ }
+
+ /**
+ * Return the identity matrix
+ * The identity matrix, or sometimes ambiguously called a unit matrix, of size n is the n × n square matrix
+ * with ones on the main diagonal and zeros elsewhere
+ *
+ * @param Matrix $matrix The matrix whose identity we wish to calculate
+ * @return Matrix
+ * @throws Exception
+ **/
+ public static function identity(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Identity can only be created for a square matrix');
+ }
+
+ $dimensions = $matrix->rows;
+
+ return Builder::createIdentityMatrix($dimensions);
+ }
+
+ /**
+ * Return the inverse of this matrix
+ *
+ * @param Matrix $matrix The matrix whose inverse we wish to calculate
+ * @return Matrix
+ * @throws Exception
+ **/
+ public static function inverse(Matrix $matrix, string $type = 'inverse')
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception(ucfirst($type) . ' can only be calculated for a square matrix');
+ }
+
+ $determinant = self::getDeterminant($matrix);
+ if ($determinant == 0.0) {
+ throw new Div0Exception(ucfirst($type) . ' can only be calculated for a matrix with a non-zero determinant');
+ }
+
+ if ($matrix->rows == 1) {
+ return new Matrix([[1 / $matrix->getValue(1, 1)]]);
+ }
+
+ return self::getAdjoint($matrix)
+ ->multiply(1 / $determinant);
+ }
+
+ /**
+ * Calculate the minors of the matrix
+ *
+ * @param Matrix $matrix The matrix whose minors we wish to calculate
+ * @return array[]
+ *
+ * @throws Exception
+ */
+ protected static function getMinors(Matrix $matrix)
+ {
+ $minors = $matrix->toArray();
+ $dimensions = $matrix->rows;
+ if ($dimensions == 1) {
+ return $minors;
+ }
+
+ for ($i = 0; $i < $dimensions; ++$i) {
+ for ($j = 0; $j < $dimensions; ++$j) {
+ $minors[$i][$j] = self::getDeterminantSegment($matrix, $i, $j);
+ }
+ }
+
+ return $minors;
+ }
+
+ /**
+ * Return the minors of the matrix
+ * The minor of a matrix A is the determinant of some smaller square matrix, cut down from A by removing one or
+ * more of its rows or columns.
+ * Minors obtained by removing just one row and one column from square matrices (first minors) are required for
+ * calculating matrix cofactors, which in turn are useful for computing both the determinant and inverse of
+ * square matrices.
+ *
+ * @param Matrix $matrix The matrix whose minors we wish to calculate
+ * @return Matrix
+ * @throws Exception
+ **/
+ public static function minors(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Minors can only be calculated for a square matrix');
+ }
+
+ return new Matrix(self::getMinors($matrix));
+ }
+
+ /**
+ * Return the trace of this matrix
+ * The trace is defined as the sum of the elements on the main diagonal (the diagonal from the upper left to the lower right)
+ * of the matrix
+ *
+ * @param Matrix $matrix The matrix whose trace we wish to calculate
+ * @return float
+ * @throws Exception
+ **/
+ public static function trace(Matrix $matrix)
+ {
+ if (!$matrix->isSquare()) {
+ throw new Exception('Trace can only be extracted from a square matrix');
+ }
+
+ $dimensions = $matrix->rows;
+ $result = 0;
+ for ($i = 1; $i <= $dimensions; ++$i) {
+ $result += $matrix->getValue($i, $i);
+ }
+
+ return $result;
+ }
+
+ /**
+ * Return the transpose of this matrix
+ *
+ * @param Matrix $matrix The matrix whose transpose we wish to calculate
+ * @return Matrix
+ **/
+ public static function transpose(Matrix $matrix)
+ {
+ $array = array_values(array_merge([null], $matrix->toArray()));
+ $grid = call_user_func_array(
+ 'array_map',
+ $array
+ );
+
+ return new Matrix($grid);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/adjoint.php b/vendor/markbaker/matrix/classes/src/Functions/adjoint.php new file mode 100644 index 0000000..aafbb0f --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/adjoint.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix adjoint() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the adjoint of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The new matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\adjoint')) {
+ function adjoint($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::adjoint($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/antidiagonal.php b/vendor/markbaker/matrix/classes/src/Functions/antidiagonal.php new file mode 100644 index 0000000..8904912 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/antidiagonal.php @@ -0,0 +1,31 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix antidiagonal() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the antidiagonal of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The new matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\antidiagonal')) {
+ function antidiagonal($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::antidiagonal($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/cofactors.php b/vendor/markbaker/matrix/classes/src/Functions/cofactors.php new file mode 100644 index 0000000..c071e45 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/cofactors.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix cofactors() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the cofactors of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The new matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\cofactors')) {
+ function cofactors($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::cofactors($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/determinant.php b/vendor/markbaker/matrix/classes/src/Functions/determinant.php new file mode 100644 index 0000000..d3573ab --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/determinant.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix determinant() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the determinant of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return float Matrix determinant
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\determinant')) {
+ function determinant($matrix): float
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::determinant($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/diagonal.php b/vendor/markbaker/matrix/classes/src/Functions/diagonal.php new file mode 100644 index 0000000..8993db3 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/diagonal.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix diagonal() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the diagonal of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The new matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\diagonal')) {
+ function diagonal($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::diagonal($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/identity.php b/vendor/markbaker/matrix/classes/src/Functions/identity.php new file mode 100644 index 0000000..7f870db --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/identity.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix identity() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the identity of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The identity matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\identity')) {
+ function identity($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::identity($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/inverse.php b/vendor/markbaker/matrix/classes/src/Functions/inverse.php new file mode 100644 index 0000000..4bf08d0 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/inverse.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix inverse() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the inverse of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The new matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\inverse')) {
+ function inverse($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::inverse($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/minors.php b/vendor/markbaker/matrix/classes/src/Functions/minors.php new file mode 100644 index 0000000..f34833b --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/minors.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix minors() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the minors of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The new matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\minors')) {
+ function minors($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::minors($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/trace.php b/vendor/markbaker/matrix/classes/src/Functions/trace.php new file mode 100644 index 0000000..0c395f6 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/trace.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix trace() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the trace of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return float The trace of the matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\trace')) {
+ function trace($matrix): float
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::trace($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Functions/transpose.php b/vendor/markbaker/matrix/classes/src/Functions/transpose.php new file mode 100644 index 0000000..8413634 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Functions/transpose.php @@ -0,0 +1,32 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix transpose() function
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+/**
+ * Returns the transpose of a matrix or an array.
+ *
+ * @param Matrix|array $matrix Matrix or an array to treat as a matrix.
+ * @return Matrix The transposed matrix
+ * @throws Exception If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\transpose')) {
+ function transpose($matrix): Matrix
+ {
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Must be Matrix or array');
+ }
+
+ return Functions::transpose($matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Matrix.php b/vendor/markbaker/matrix/classes/src/Matrix.php new file mode 100644 index 0000000..bb0a268 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Matrix.php @@ -0,0 +1,423 @@ +<?php
+
+/**
+ *
+ * Class for the management of Matrices
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Generator;
+use Matrix\Decomposition\LU;
+use Matrix\Decomposition\QR;
+
+/**
+ * Matrix object.
+ *
+ * @package Matrix
+ *
+ * @property-read int $rows The number of rows in the matrix
+ * @property-read int $columns The number of columns in the matrix
+ * @method Matrix antidiagonal()
+ * @method Matrix adjoint()
+ * @method Matrix cofactors()
+ * @method float determinant()
+ * @method Matrix diagonal()
+ * @method Matrix identity()
+ * @method Matrix inverse()
+ * @method Matrix pseudoInverse()
+ * @method Matrix minors()
+ * @method float trace()
+ * @method Matrix transpose()
+ * @method Matrix add(...$matrices)
+ * @method Matrix subtract(...$matrices)
+ * @method Matrix multiply(...$matrices)
+ * @method Matrix divideby(...$matrices)
+ * @method Matrix divideinto(...$matrices)
+ * @method Matrix directsum(...$matrices)
+ */
+class Matrix
+{
+ protected $rows;
+ protected $columns;
+ protected $grid = [];
+
+ /*
+ * Create a new Matrix object from an array of values
+ *
+ * @param array $grid
+ */
+ final public function __construct(array $grid)
+ {
+ $this->buildFromArray(array_values($grid));
+ }
+
+ /*
+ * Create a new Matrix object from an array of values
+ *
+ * @param array $grid
+ */
+ protected function buildFromArray(array $grid): void
+ {
+ $this->rows = count($grid);
+ $columns = array_reduce(
+ $grid,
+ function ($carry, $value) {
+ return max($carry, is_array($value) ? count($value) : 1);
+ }
+ );
+ $this->columns = $columns;
+
+ array_walk(
+ $grid,
+ function (&$value) use ($columns) {
+ if (!is_array($value)) {
+ $value = [$value];
+ }
+ $value = array_pad(array_values($value), $columns, null);
+ }
+ );
+
+ $this->grid = $grid;
+ }
+
+ /**
+ * Validate that a row number is a positive integer
+ *
+ * @param int $row
+ * @return int
+ * @throws Exception
+ */
+ public static function validateRow(int $row): int
+ {
+ if ((!is_numeric($row)) || (intval($row) < 1)) {
+ throw new Exception('Invalid Row');
+ }
+
+ return (int)$row;
+ }
+
+ /**
+ * Validate that a column number is a positive integer
+ *
+ * @param int $column
+ * @return int
+ * @throws Exception
+ */
+ public static function validateColumn(int $column): int
+ {
+ if ((!is_numeric($column)) || (intval($column) < 1)) {
+ throw new Exception('Invalid Column');
+ }
+
+ return (int)$column;
+ }
+
+ /**
+ * Validate that a row number falls within the set of rows for this matrix
+ *
+ * @param int $row
+ * @return int
+ * @throws Exception
+ */
+ protected function validateRowInRange(int $row): int
+ {
+ $row = static::validateRow($row);
+ if ($row > $this->rows) {
+ throw new Exception('Requested Row exceeds matrix size');
+ }
+
+ return $row;
+ }
+
+ /**
+ * Validate that a column number falls within the set of columns for this matrix
+ *
+ * @param int $column
+ * @return int
+ * @throws Exception
+ */
+ protected function validateColumnInRange(int $column): int
+ {
+ $column = static::validateColumn($column);
+ if ($column > $this->columns) {
+ throw new Exception('Requested Column exceeds matrix size');
+ }
+
+ return $column;
+ }
+
+ /**
+ * Return a new matrix as a subset of rows from this matrix, starting at row number $row, and $rowCount rows
+ * A $rowCount value of 0 will return all rows of the matrix from $row
+ * A negative $rowCount value will return rows until that many rows from the end of the matrix
+ *
+ * Note that row numbers start from 1, not from 0
+ *
+ * @param int $row
+ * @param int $rowCount
+ * @return static
+ * @throws Exception
+ */
+ public function getRows(int $row, int $rowCount = 1): Matrix
+ {
+ $row = $this->validateRowInRange($row);
+ if ($rowCount === 0) {
+ $rowCount = $this->rows - $row + 1;
+ }
+
+ return new static(array_slice($this->grid, $row - 1, (int)$rowCount));
+ }
+
+ /**
+ * Return a new matrix as a subset of columns from this matrix, starting at column number $column, and $columnCount columns
+ * A $columnCount value of 0 will return all columns of the matrix from $column
+ * A negative $columnCount value will return columns until that many columns from the end of the matrix
+ *
+ * Note that column numbers start from 1, not from 0
+ *
+ * @param int $column
+ * @param int $columnCount
+ * @return Matrix
+ * @throws Exception
+ */
+ public function getColumns(int $column, int $columnCount = 1): Matrix
+ {
+ $column = $this->validateColumnInRange($column);
+ if ($columnCount < 1) {
+ $columnCount = $this->columns + $columnCount - $column + 1;
+ }
+
+ $grid = [];
+ for ($i = $column - 1; $i < $column + $columnCount - 1; ++$i) {
+ $grid[] = array_column($this->grid, $i);
+ }
+
+ return (new static($grid))->transpose();
+ }
+
+ /**
+ * Return a new matrix as a subset of rows from this matrix, dropping rows starting at row number $row,
+ * and $rowCount rows
+ * A negative $rowCount value will drop rows until that many rows from the end of the matrix
+ * A $rowCount value of 0 will remove all rows of the matrix from $row
+ *
+ * Note that row numbers start from 1, not from 0
+ *
+ * @param int $row
+ * @param int $rowCount
+ * @return static
+ * @throws Exception
+ */
+ public function dropRows(int $row, int $rowCount = 1): Matrix
+ {
+ $this->validateRowInRange($row);
+ if ($rowCount === 0) {
+ $rowCount = $this->rows - $row + 1;
+ }
+
+ $grid = $this->grid;
+ array_splice($grid, $row - 1, (int)$rowCount);
+
+ return new static($grid);
+ }
+
+ /**
+ * Return a new matrix as a subset of columns from this matrix, dropping columns starting at column number $column,
+ * and $columnCount columns
+ * A negative $columnCount value will drop columns until that many columns from the end of the matrix
+ * A $columnCount value of 0 will remove all columns of the matrix from $column
+ *
+ * Note that column numbers start from 1, not from 0
+ *
+ * @param int $column
+ * @param int $columnCount
+ * @return static
+ * @throws Exception
+ */
+ public function dropColumns(int $column, int $columnCount = 1): Matrix
+ {
+ $this->validateColumnInRange($column);
+ if ($columnCount < 1) {
+ $columnCount = $this->columns + $columnCount - $column + 1;
+ }
+
+ $grid = $this->grid;
+ array_walk(
+ $grid,
+ function (&$row) use ($column, $columnCount) {
+ array_splice($row, $column - 1, (int)$columnCount);
+ }
+ );
+
+ return new static($grid);
+ }
+
+ /**
+ * Return a value from this matrix, from the "cell" identified by the row and column numbers
+ * Note that row and column numbers start from 1, not from 0
+ *
+ * @param int $row
+ * @param int $column
+ * @return mixed
+ * @throws Exception
+ */
+ public function getValue(int $row, int $column)
+ {
+ $row = $this->validateRowInRange($row);
+ $column = $this->validateColumnInRange($column);
+
+ return $this->grid[$row - 1][$column - 1];
+ }
+
+ /**
+ * Returns a Generator that will yield each row of the matrix in turn as a vector matrix
+ * or the value of each cell if the matrix is a column vector
+ *
+ * @return Generator|Matrix[]|mixed[]
+ */
+ public function rows(): Generator
+ {
+ foreach ($this->grid as $i => $row) {
+ yield $i + 1 => ($this->columns == 1)
+ ? $row[0]
+ : new static([$row]);
+ }
+ }
+
+ /**
+ * Returns a Generator that will yield each column of the matrix in turn as a vector matrix
+ * or the value of each cell if the matrix is a row vector
+ *
+ * @return Generator|Matrix[]|mixed[]
+ */
+ public function columns(): Generator
+ {
+ for ($i = 0; $i < $this->columns; ++$i) {
+ yield $i + 1 => ($this->rows == 1)
+ ? $this->grid[0][$i]
+ : new static(array_column($this->grid, $i));
+ }
+ }
+
+ /**
+ * Identify if the row and column dimensions of this matrix are equal,
+ * i.e. if it is a "square" matrix
+ *
+ * @return bool
+ */
+ public function isSquare(): bool
+ {
+ return $this->rows === $this->columns;
+ }
+
+ /**
+ * Identify if this matrix is a vector
+ * i.e. if it comprises only a single row or a single column
+ *
+ * @return bool
+ */
+ public function isVector(): bool
+ {
+ return $this->rows === 1 || $this->columns === 1;
+ }
+
+ /**
+ * Return the matrix as a 2-dimensional array
+ *
+ * @return array
+ */
+ public function toArray(): array
+ {
+ return $this->grid;
+ }
+
+ /**
+ * Solve A*X = B.
+ *
+ * @param Matrix $B Right hand side
+ *
+ * @throws Exception
+ *
+ * @return Matrix ... Solution if A is square, least squares solution otherwise
+ */
+ public function solve(Matrix $B): Matrix
+ {
+ if ($this->columns === $this->rows) {
+ return (new LU($this))->solve($B);
+ }
+
+ return (new QR($this))->solve($B);
+ }
+
+ protected static $getters = [
+ 'rows',
+ 'columns',
+ ];
+
+ /**
+ * Access specific properties as read-only (no setters)
+ *
+ * @param string $propertyName
+ * @return mixed
+ * @throws Exception
+ */
+ public function __get(string $propertyName)
+ {
+ $propertyName = strtolower($propertyName);
+
+ // Test for function calls
+ if (in_array($propertyName, self::$getters)) {
+ return $this->$propertyName;
+ }
+
+ throw new Exception('Property does not exist');
+ }
+
+ protected static $functions = [
+ 'adjoint',
+ 'antidiagonal',
+ 'cofactors',
+ 'determinant',
+ 'diagonal',
+ 'identity',
+ 'inverse',
+ 'minors',
+ 'trace',
+ 'transpose',
+ ];
+
+ protected static $operations = [
+ 'add',
+ 'subtract',
+ 'multiply',
+ 'divideby',
+ 'divideinto',
+ 'directsum',
+ ];
+
+ /**
+ * Returns the result of the function call or operation
+ *
+ * @param string $functionName
+ * @param mixed[] $arguments
+ * @return Matrix|float
+ * @throws Exception
+ */
+ public function __call(string $functionName, $arguments)
+ {
+ $functionName = strtolower(str_replace('_', '', $functionName));
+
+ if (in_array($functionName, self::$functions, true) || in_array($functionName, self::$operations, true)) {
+ $functionName = "\\" . __NAMESPACE__ . "\\{$functionName}";
+ if (is_callable($functionName)) {
+ $arguments = array_values(array_merge([$this], $arguments));
+ return call_user_func_array($functionName, $arguments);
+ }
+ }
+ throw new Exception('Function or Operation does not exist');
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operations/add.php b/vendor/markbaker/matrix/classes/src/Operations/add.php new file mode 100644 index 0000000..5ac9a5e --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operations/add.php @@ -0,0 +1,46 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix addition operation
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\Addition;
+
+/**
+ * Adds two or more matrices
+ *
+ * @param array<int, mixed> $matrixValues The matrices to add
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\add')) {
+ function add(...$matrixValues): Matrix
+ {
+ if (count($matrixValues) < 2) {
+ throw new Exception('Addition operation requires at least 2 arguments');
+ }
+
+ $matrix = array_shift($matrixValues);
+
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Addition arguments must be Matrix or array');
+ }
+
+ $result = new Addition($matrix);
+
+ foreach ($matrixValues as $matrix) {
+ $result->execute($matrix);
+ }
+
+ return $result->result();
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operations/directsum.php b/vendor/markbaker/matrix/classes/src/Operations/directsum.php new file mode 100644 index 0000000..21c0c62 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operations/directsum.php @@ -0,0 +1,46 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix direct sum operation
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\DirectSum;
+
+/**
+ * Adds two or more matrices
+ *
+ * @param array<int, mixed> $matrixValues The matrices to add
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\directsum')) {
+ function directsum(...$matrixValues): Matrix
+ {
+ if (count($matrixValues) < 2) {
+ throw new Exception('DirectSum operation requires at least 2 arguments');
+ }
+
+ $matrix = array_shift($matrixValues);
+
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('DirectSum arguments must be Matrix or array');
+ }
+
+ $result = new DirectSum($matrix);
+
+ foreach ($matrixValues as $matrix) {
+ $result->execute($matrix);
+ }
+
+ return $result->result();
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operations/divideby.php b/vendor/markbaker/matrix/classes/src/Operations/divideby.php new file mode 100644 index 0000000..5dd0b19 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operations/divideby.php @@ -0,0 +1,46 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix division operation
+ *
+ * @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\Division;
+
+/**
+ * Divides two or more matrix numbers
+ *
+ * @param array<int, mixed> $matrixValues The matrices to divide
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\divideby')) {
+ function divideby(...$matrixValues): Matrix
+ {
+ if (count($matrixValues) < 2) {
+ throw new Exception('Division operation requires at least 2 arguments');
+ }
+
+ $matrix = array_shift($matrixValues);
+
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Division arguments must be Matrix or array');
+ }
+
+ $result = new Division($matrix);
+
+ foreach ($matrixValues as $matrix) {
+ $result->execute($matrix);
+ }
+
+ return $result->result();
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operations/divideinto.php b/vendor/markbaker/matrix/classes/src/Operations/divideinto.php new file mode 100644 index 0000000..dfbb2df --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operations/divideinto.php @@ -0,0 +1,47 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix division operation
+ *
+ * @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\Division;
+
+/**
+ * Divides two or more matrix numbers
+ *
+ * @param array<int, mixed> $matrixValues The numbers to divide
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\divideinto')) {
+ function divideinto(...$matrixValues): Matrix
+ {
+ if (count($matrixValues) < 2) {
+ throw new Exception('Division operation requires at least 2 arguments');
+ }
+
+ $matrix = array_pop($matrixValues);
+ $matrixValues = array_reverse($matrixValues);
+
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Division arguments must be Matrix or array');
+ }
+
+ $result = new Division($matrix);
+
+ foreach ($matrixValues as $matrix) {
+ $result->execute($matrix);
+ }
+
+ return $result->result();
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operations/multiply.php b/vendor/markbaker/matrix/classes/src/Operations/multiply.php new file mode 100644 index 0000000..45ecc77 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operations/multiply.php @@ -0,0 +1,46 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix multiplication operation
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\Multiplication;
+
+/**
+ * Multiplies two or more matrices
+ *
+ * @param array<int, mixed> $matrixValues The matrices to multiply
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\multiply')) {
+ function multiply(...$matrixValues): Matrix
+ {
+ if (count($matrixValues) < 2) {
+ throw new Exception('Multiplication operation requires at least 2 arguments');
+ }
+
+ $matrix = array_shift($matrixValues);
+
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Multiplication arguments must be Matrix or array');
+ }
+
+ $result = new Multiplication($matrix);
+
+ foreach ($matrixValues as $matrix) {
+ $result->execute($matrix);
+ }
+
+ return $result->result();
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operations/subtract.php b/vendor/markbaker/matrix/classes/src/Operations/subtract.php new file mode 100644 index 0000000..72759b7 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operations/subtract.php @@ -0,0 +1,46 @@ +<?php
+
+/**
+ *
+ * Function code for the matrix subtraction operation
+ *
+ * @copyright Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\Subtraction;
+
+/**
+ * Subtracts two or more matrices
+ *
+ * @param array<int, mixed> $matrixValues The matrices to subtract
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\subtract')) {
+ function subtract(...$matrixValues): Matrix
+ {
+ if (count($matrixValues) < 2) {
+ throw new Exception('Subtraction operation requires at least 2 arguments');
+ }
+
+ $matrix = array_shift($matrixValues);
+
+ if (is_array($matrix)) {
+ $matrix = new Matrix($matrix);
+ }
+ if (!$matrix instanceof Matrix) {
+ throw new Exception('Subtraction arguments must be Matrix or array');
+ }
+
+ $result = new Subtraction($matrix);
+
+ foreach ($matrixValues as $matrix) {
+ $result->execute($matrix);
+ }
+
+ return $result->result();
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operators/Addition.php b/vendor/markbaker/matrix/classes/src/Operators/Addition.php new file mode 100644 index 0000000..87bd342 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operators/Addition.php @@ -0,0 +1,68 @@ +<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+class Addition extends Operator
+{
+ /**
+ * Execute the addition
+ *
+ * @param mixed $value The matrix or numeric value to add to the current base value
+ * @throws Exception If the provided argument is not appropriate for the operation
+ * @return $this The operation object, allowing multiple additions to be chained
+ **/
+ public function execute($value): Operator
+ {
+ if (is_array($value)) {
+ $value = new Matrix($value);
+ }
+
+ if (is_object($value) && ($value instanceof Matrix)) {
+ return $this->addMatrix($value);
+ } elseif (is_numeric($value)) {
+ return $this->addScalar($value);
+ }
+
+ throw new Exception('Invalid argument for addition');
+ }
+
+ /**
+ * Execute the addition for a scalar
+ *
+ * @param mixed $value The numeric value to add to the current base value
+ * @return $this The operation object, allowing multiple additions to be chained
+ **/
+ protected function addScalar($value): Operator
+ {
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ $this->matrix[$row][$column] += $value;
+ }
+ }
+
+ return $this;
+ }
+
+ /**
+ * Execute the addition for a matrix
+ *
+ * @param Matrix $value The numeric value to add to the current base value
+ * @return $this The operation object, allowing multiple additions to be chained
+ * @throws Exception If the provided argument is not appropriate for the operation
+ **/
+ protected function addMatrix(Matrix $value): Operator
+ {
+ $this->validateMatchingDimensions($value);
+
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ $this->matrix[$row][$column] += $value->getValue($row + 1, $column + 1);
+ }
+ }
+
+ return $this;
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php b/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php new file mode 100644 index 0000000..e729a43 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php @@ -0,0 +1,64 @@ +<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+class DirectSum extends Operator
+{
+ /**
+ * Execute the addition
+ *
+ * @param mixed $value The matrix or numeric value to add to the current base value
+ * @return $this The operation object, allowing multiple additions to be chained
+ * @throws Exception If the provided argument is not appropriate for the operation
+ */
+ public function execute($value): Operator
+ {
+ if (is_array($value)) {
+ $value = new Matrix($value);
+ }
+
+ if ($value instanceof Matrix) {
+ return $this->directSumMatrix($value);
+ }
+
+ throw new Exception('Invalid argument for addition');
+ }
+
+ /**
+ * Execute the direct sum for a matrix
+ *
+ * @param Matrix $value The numeric value to concatenate/direct sum with the current base value
+ * @return $this The operation object, allowing multiple additions to be chained
+ **/
+ private function directSumMatrix($value): Operator
+ {
+ $originalColumnCount = count($this->matrix[0]);
+ $originalRowCount = count($this->matrix);
+ $valColumnCount = $value->columns;
+ $valRowCount = $value->rows;
+ $value = $value->toArray();
+
+ for ($row = 0; $row < $this->rows; ++$row) {
+ $this->matrix[$row] = array_merge($this->matrix[$row], array_fill(0, $valColumnCount, 0));
+ }
+
+ $this->matrix = array_merge(
+ $this->matrix,
+ array_fill(0, $valRowCount, array_fill(0, $originalColumnCount, 0))
+ );
+
+ for ($row = $originalRowCount; $row < $originalRowCount + $valRowCount; ++$row) {
+ array_splice(
+ $this->matrix[$row],
+ $originalColumnCount,
+ $valColumnCount,
+ $value[$row - $originalRowCount]
+ );
+ }
+
+ return $this;
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operators/Division.php b/vendor/markbaker/matrix/classes/src/Operators/Division.php new file mode 100644 index 0000000..3cdedfb --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operators/Division.php @@ -0,0 +1,35 @@ +<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Div0Exception;
+use Matrix\Exception;
+use \Matrix\Matrix;
+use \Matrix\Functions;
+
+class Division extends Multiplication
+{
+ /**
+ * Execute the division
+ *
+ * @param mixed $value The matrix or numeric value to divide the current base value by
+ * @throws Exception If the provided argument is not appropriate for the operation
+ * @return $this The operation object, allowing multiple divisions to be chained
+ **/
+ public function execute($value, string $type = 'division'): Operator
+ {
+ if (is_array($value)) {
+ $value = new Matrix($value);
+ }
+
+ if (is_object($value) && ($value instanceof Matrix)) {
+ $value = Functions::inverse($value, $type);
+
+ return $this->multiplyMatrix($value, $type);
+ } elseif (is_numeric($value)) {
+ return $this->multiplyScalar(1 / $value, $type);
+ }
+
+ throw new Exception('Invalid argument for division');
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operators/Multiplication.php b/vendor/markbaker/matrix/classes/src/Operators/Multiplication.php new file mode 100644 index 0000000..13d14f0 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operators/Multiplication.php @@ -0,0 +1,86 @@ +<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use \Matrix\Builder;
+use Matrix\Exception;
+use Throwable;
+
+class Multiplication extends Operator
+{
+ /**
+ * Execute the multiplication
+ *
+ * @param mixed $value The matrix or numeric value to multiply the current base value by
+ * @throws Exception If the provided argument is not appropriate for the operation
+ * @return $this The operation object, allowing multiple multiplications to be chained
+ **/
+ public function execute($value, string $type = 'multiplication'): Operator
+ {
+ if (is_array($value)) {
+ $value = new Matrix($value);
+ }
+
+ if (is_object($value) && ($value instanceof Matrix)) {
+ return $this->multiplyMatrix($value, $type);
+ } elseif (is_numeric($value)) {
+ return $this->multiplyScalar($value, $type);
+ }
+
+ throw new Exception("Invalid argument for $type");
+ }
+
+ /**
+ * Execute the multiplication for a scalar
+ *
+ * @param mixed $value The numeric value to multiply with the current base value
+ * @return $this The operation object, allowing multiple mutiplications to be chained
+ **/
+ protected function multiplyScalar($value, string $type = 'multiplication'): Operator
+ {
+ try {
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ $this->matrix[$row][$column] *= $value;
+ }
+ }
+ } catch (Throwable $e) {
+ throw new Exception("Invalid argument for $type");
+ }
+
+ return $this;
+ }
+
+ /**
+ * Execute the multiplication for a matrix
+ *
+ * @param Matrix $value The numeric value to multiply with the current base value
+ * @return $this The operation object, allowing multiple mutiplications to be chained
+ * @throws Exception If the provided argument is not appropriate for the operation
+ **/
+ protected function multiplyMatrix(Matrix $value, string $type = 'multiplication'): Operator
+ {
+ $this->validateReflectingDimensions($value);
+
+ $newRows = $this->rows;
+ $newColumns = $value->columns;
+ $matrix = Builder::createFilledMatrix(0, $newRows, $newColumns)
+ ->toArray();
+ try {
+ for ($row = 0; $row < $newRows; ++$row) {
+ for ($column = 0; $column < $newColumns; ++$column) {
+ $columnData = $value->getColumns($column + 1)->toArray();
+ foreach ($this->matrix[$row] as $key => $valueData) {
+ $matrix[$row][$column] += $valueData * $columnData[$key][0];
+ }
+ }
+ }
+ } catch (Throwable $e) {
+ throw new Exception("Invalid argument for $type");
+ }
+ $this->matrix = $matrix;
+
+ return $this;
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operators/Operator.php b/vendor/markbaker/matrix/classes/src/Operators/Operator.php new file mode 100644 index 0000000..b7f4025 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operators/Operator.php @@ -0,0 +1,78 @@ +<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+abstract class Operator
+{
+ /**
+ * Stored internally as a 2-dimension array of values
+ *
+ * @property mixed[][] $matrix
+ **/
+ protected $matrix;
+
+ /**
+ * Number of rows in the matrix
+ *
+ * @property integer $rows
+ **/
+ protected $rows;
+
+ /**
+ * Number of columns in the matrix
+ *
+ * @property integer $columns
+ **/
+ protected $columns;
+
+ /**
+ * Create an new handler object for the operation
+ *
+ * @param Matrix $matrix The base Matrix object on which the operation will be performed
+ */
+ public function __construct(Matrix $matrix)
+ {
+ $this->rows = $matrix->rows;
+ $this->columns = $matrix->columns;
+ $this->matrix = $matrix->toArray();
+ }
+
+ /**
+ * Compare the dimensions of the matrices being operated on to see if they are valid for addition/subtraction
+ *
+ * @param Matrix $matrix The second Matrix object on which the operation will be performed
+ * @throws Exception
+ */
+ protected function validateMatchingDimensions(Matrix $matrix): void
+ {
+ if (($this->rows != $matrix->rows) || ($this->columns != $matrix->columns)) {
+ throw new Exception('Matrices have mismatched dimensions');
+ }
+ }
+
+ /**
+ * Compare the dimensions of the matrices being operated on to see if they are valid for multiplication/division
+ *
+ * @param Matrix $matrix The second Matrix object on which the operation will be performed
+ * @throws Exception
+ */
+ protected function validateReflectingDimensions(Matrix $matrix): void
+ {
+ if ($this->columns != $matrix->rows) {
+ throw new Exception('Matrices have mismatched dimensions');
+ }
+ }
+
+ /**
+ * Return the result of the operation
+ *
+ * @return Matrix
+ */
+ public function result(): Matrix
+ {
+ return new Matrix($this->matrix);
+ }
+}
diff --git a/vendor/markbaker/matrix/classes/src/Operators/Subtraction.php b/vendor/markbaker/matrix/classes/src/Operators/Subtraction.php new file mode 100644 index 0000000..14b3541 --- /dev/null +++ b/vendor/markbaker/matrix/classes/src/Operators/Subtraction.php @@ -0,0 +1,68 @@ +<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+class Subtraction extends Operator
+{
+ /**
+ * Execute the subtraction
+ *
+ * @param mixed $value The matrix or numeric value to subtract from the current base value
+ * @throws Exception If the provided argument is not appropriate for the operation
+ * @return $this The operation object, allowing multiple subtractions to be chained
+ **/
+ public function execute($value): Operator
+ {
+ if (is_array($value)) {
+ $value = new Matrix($value);
+ }
+
+ if (is_object($value) && ($value instanceof Matrix)) {
+ return $this->subtractMatrix($value);
+ } elseif (is_numeric($value)) {
+ return $this->subtractScalar($value);
+ }
+
+ throw new Exception('Invalid argument for subtraction');
+ }
+
+ /**
+ * Execute the subtraction for a scalar
+ *
+ * @param mixed $value The numeric value to subtracted from the current base value
+ * @return $this The operation object, allowing multiple additions to be chained
+ **/
+ protected function subtractScalar($value): Operator
+ {
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ $this->matrix[$row][$column] -= $value;
+ }
+ }
+
+ return $this;
+ }
+
+ /**
+ * Execute the subtraction for a matrix
+ *
+ * @param Matrix $value The numeric value to subtract from the current base value
+ * @return $this The operation object, allowing multiple subtractions to be chained
+ * @throws Exception If the provided argument is not appropriate for the operation
+ **/
+ protected function subtractMatrix(Matrix $value): Operator
+ {
+ $this->validateMatchingDimensions($value);
+
+ for ($row = 0; $row < $this->rows; ++$row) {
+ for ($column = 0; $column < $this->columns; ++$column) {
+ $this->matrix[$row][$column] -= $value->getValue($row + 1, $column + 1);
+ }
+ }
+
+ return $this;
+ }
+}
|