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;
当前路径:Classes/PHPExcel/Shared/JAMA/Matrix.php
<?php
/**
 * @package JAMA
 */

/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
    /**
     * @ignore
     */
    define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../../');
    require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}


/*
 *    Matrix class
 *
 *    @author Paul Meagher
 *    @author Michael Bommarito
 *    @author Lukasz Karapuda
 *    @author Bartek Matosiuk
 *    @version 1.8
 *    @license PHP v3.0
 *    @see http://math.nist.gov/javanumerics/jama/
 */
class PHPExcel_Shared_JAMA_Matrix
{
    const POLYMORPHIC_ARGUMENT_EXCEPTION = "Invalid argument pattern for polymorphic function.";
    const ARGUMENT_TYPE_EXCEPTION        = "Invalid argument type.";
    const ARGUMENT_BOUNDS_EXCEPTION      = "Invalid argument range.";
    const MATRIX_DIMENSION_EXCEPTION     = "Matrix dimensions are not equal.";
    const ARRAY_LENGTH_EXCEPTION         = "Array length must be a multiple of m.";

    /**
     *    Matrix storage
     *
     *    @var array
     *    @access public
     */
    public $A = array();

    /**
     *    Matrix row dimension
     *
     *    @var int
     *    @access private
     */
    private $m;

    /**
     *    Matrix column dimension
     *
     *    @var int
     *    @access private
     */
    private $n;

    /**
     *    Polymorphic constructor
     *
     *    As PHP has no support for polymorphic constructors, we hack our own sort of polymorphism using func_num_args, func_get_arg, and gettype. In essence, we're just implementing a simple RTTI filter and calling the appropriate constructor.
     */
    public function __construct()
    {
        if (func_num_args() > 0) {
            $args = func_get_args();
            $match = implode(",", array_map('gettype', $args));

            switch ($match) {
                //Rectangular matrix - m x n initialized from 2D array
                case 'array':
                    $this->m = count($args[0]);
                    $this->n = count($args[0][0]);
                    $this->A = $args[0];
                    break;
                //Square matrix - n x n
                case 'integer':
                    $this->m = $args[0];
                    $this->n = $args[0];
                    $this->A = array_fill(0, $this->m, array_fill(0, $this->n, 0));
                    break;
                //Rectangular matrix - m x n
                case 'integer,integer':
                    $this->m = $args[0];
                    $this->n = $args[1];
                    $this->A = array_fill(0, $this->m, array_fill(0, $this->n, 0));
                    break;
                //Rectangular matrix - m x n initialized from packed array
                case 'array,integer':
                    $this->m = $args[1];
                    if ($this->m != 0) {
                        $this->n = count($args[0]) / $this->m;
                    } else {
                        $this->n = 0;
                    }
                    if (($this->m * $this->n) == count($args[0])) {
                        for ($i = 0; $i < $this->m; ++$i) {
                            for ($j = 0; $j < $this->n; ++$j) {
                                $this->A[$i][$j] = $args[0][$i + $j * $this->m];
                            }
                        }
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARRAY_LENGTH_EXCEPTION);
                    }
                    break;
                default:
                    throw new PHPExcel_Calculation_Exception(self::POLYMORPHIC_ARGUMENT_EXCEPTION);
                    break;
            }
        } else {
            throw new PHPExcel_Calculation_Exception(self::POLYMORPHIC_ARGUMENT_EXCEPTION);
        }
    }

    /**
     *    getArray
     *
     *    @return array Matrix array
     */
    public function getArray()
    {
        return $this->A;
    }

    /**
     *    getRowDimension
     *
     *    @return int Row dimension
     */
    public function getRowDimension()
    {
        return $this->m;
    }

    /**
     *    getColumnDimension
     *
     *    @return int Column dimension
     */
    public function getColumnDimension()
    {
        return $this->n;
    }

    /**
     *    get
     *
     *    Get the i,j-th element of the matrix.
     *    @param int $i Row position
     *    @param int $j Column position
     *    @return mixed Element (int/float/double)
     */
    public function get($i = null, $j = null)
    {
        return $this->A[$i][$j];
    }

    /**
     *    getMatrix
     *
     *    Get a submatrix
     *    @param int $i0 Initial row index
     *    @param int $iF Final row index
     *    @param int $j0 Initial column index
     *    @param int $jF Final column index
     *    @return Matrix Submatrix
     */
    public function getMatrix()
    {
        if (func_num_args() > 0) {
            $args = func_get_args();
            $match = implode(",", array_map('gettype', $args));

            switch ($match) {
                //A($i0...; $j0...)
                case 'integer,integer':
                    list($i0, $j0) = $args;
                    if ($i0 >= 0) {
                        $m = $this->m - $i0;
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARGUMENT_BOUNDS_EXCEPTION);
                    }
                    if ($j0 >= 0) {
                        $n = $this->n - $j0;
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARGUMENT_BOUNDS_EXCEPTION);
                    }
                    $R = new PHPExcel_Shared_JAMA_Matrix($m, $n);
                    for ($i = $i0; $i < $this->m; ++$i) {
                        for ($j = $j0; $j < $this->n; ++$j) {
                            $R->set($i, $j, $this->A[$i][$j]);
                        }
                    }
                    return $R;
                    break;
                //A($i0...$iF; $j0...$jF)
                case 'integer,integer,integer,integer':
                    list($i0, $iF, $j0, $jF) = $args;
                    if (($iF > $i0) && ($this->m >= $iF) && ($i0 >= 0)) {
                        $m = $iF - $i0;
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARGUMENT_BOUNDS_EXCEPTION);
                    }
                    if (($jF > $j0) && ($this->n >= $jF) && ($j0 >= 0)) {
                        $n = $jF - $j0;
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARGUMENT_BOUNDS_EXCEPTION);
                    }
                    $R = new PHPExcel_Shared_JAMA_Matrix($m+1, $n+1);
                    for ($i = $i0; $i <= $iF; ++$i) {
                        for ($j = $j0; $j <= $jF; ++$j) {
                            $R->set($i - $i0, $j - $j0, $this->A[$i][$j]);
                        }
                    }
                    return $R;
                    break;
                //$R = array of row indices; $C = array of column indices
                case 'array,array':
                    list($RL, $CL) = $args;
                    if (count($RL) > 0) {
                        $m = count($RL);
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARGUMENT_BOUNDS_EXCEPTION);
                    }
                    if (count($CL) > 0) {
                        $n = count($CL);
                    } else {
                        throw new PHPExcel_Calculation_Exception(self::ARGUMENT_BOUNDS_EXCEPTION);
                    }
                    $R = new PHPExcel_Shared_JAMA_Matrix($m, $n);
                    for ($i = 0; $i < $m; ++$i) {
                        for ($j = 0; $j < $n; ++$j) {
                            $R->set($i - $i0, $j - $j0, $this->A[$RL[$i]][$CL[$j]]);
                        }
                    }
                    return $R;
                    break;
                //$RL = array of row indices; $CL = array of column indices
                case 'array,array':
                    list($RL, $CL) = $args;
                    if (count($RL) > 0) {
                        $m = count($RL);
                    } else {
            ...
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