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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
use Matrix\Builder;
use Matrix\Exception as MatrixException;
use Matrix\Matrix;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
class MatrixFunctions
{
/**
* Convert parameter to matrix.
*
* @param mixed $matrixValues A matrix of values
*/
private static function getMatrix($matrixValues): Matrix
{
$matrixData = [];
if (!is_array($matrixValues)) {
$matrixValues = [[$matrixValues]];
}
$row = 0;
foreach ($matrixValues as $matrixRow) {
if (!is_array($matrixRow)) {
$matrixRow = [$matrixRow];
}
$column = 0;
foreach ($matrixRow as $matrixCell) {
if ((is_string($matrixCell)) || ($matrixCell === null)) {
throw new Exception(Functions::VALUE());
}
$matrixData[$row][$column] = $matrixCell;
++$column;
}
++$row;
}
return new Matrix($matrixData);
}
/**
* MDETERM.
*
* Returns the matrix determinant of an array.
*
* Excel Function:
* MDETERM(array)
*
* @param mixed $matrixValues A matrix of values
*
* @return float|string The result, or a string containing an error
*/
public static function determinant($matrixValues)
{
try {
$matrix = self::getMatrix($matrixValues);
return $matrix->determinant();
} catch (MatrixException $ex) {
return Functions::VALUE();
} catch (Exception $e) {
return $e->getMessage();
}
}
/**
* MINVERSE.
*
* Returns the inverse matrix for the matrix stored in an array.
*
* Excel Function:
* MINVERSE(array)
*
* @param mixed $matrixValues A matrix of values
*
* @return array|string The result, or a string containing an error
*/
public static function inverse($matrixValues)
{
try {
$matrix = self::getMatrix($matrixValues);
return $matrix->inverse()->toArray();
} catch (MatrixException $e) {
return (strpos($e->getMessage(), 'determinant') === false) ? Functions::VALUE() : Functions::NAN();
} catch (Exception $e) {
return $e->getMessage();
}
}
/**
* MMULT.
*
* @param mixed $matrixData1 A matrix of values
* @param mixed $matrixData2 A matrix of values
*
* @return array|string The result, or a string containing an error
*/
public static function multiply($matrixData1, $matrixData2)
{
try {
$matrixA = self::getMatrix($matrixData1);
$matrixB = self::getMatrix($matrixData2);
return $matrixA->multiply($matrixB)->toArray();
} catch (MatrixException $ex) {
return Functions::VALUE();
} catch (Exception $e) {
return $e->getMessage();
}
}
/**
* MUnit.
*
* @param mixed $dimension Number of rows and columns
*
* @return array|string The result, or a string containing an error
*/
public static function identity($dimension)
{
try {
$dimension = (int) Helpers::validateNumericNullBool($dimension);
Helpers::validatePositive($dimension, Functions::VALUE());
$matrix = Builder::createFilledMatrix(0, $dimension)->toArray();
for ($x = 0; $x < $dimension; ++$x) {
$matrix[$x][$x] = 1;
}
return $matrix;
} catch (Exception $e) {
return $e->getMessage();
}
}
}