\PHPExcel_Shared_JAMA_LUDecomposition

Summary

Methods

Properties

Constants

__construct()
getL()
getU()
getPivot()
getDoublePivot()
isNonsingular()
det()
solve()

No public properties found

MatrixSingularException
MatrixSquareException

No protected methods found

No protected properties found

N/A

No private methods found

$LU
$m
$n
$pivsign
$piv

N/A

File: core/class/PHPExcel/Shared/JAMA/LUDecomposition.php
Package: TheprimaryuseoftheLUdecompositionisinthesolutionofsquaresystemsofsimultaneouslinearequations\ThiswillfailifisNonsingularreturnsfalse
Class hierarchy: \PHPExcel_Shared_JAMA_LUDecomposition
Uses

Constants

MatrixSingularException

MatrixSingularException = "Can only perform operation on singular matrix."

MatrixSquareException

MatrixSquareException = "Mismatched Row dimension"

Properties

$LU

$LU : array

Decomposition storage

Type

array —

$m

$m : int

Row dimension.

Type

int —

$n

$n : int

Column dimension.

Type

int —

$pivsign

$pivsign : int

Pivot sign.

Type

int —

$piv

$piv : array

Internal storage of pivot vector.

Type

array —

Methods

__construct()

__construct( $A) : \Structure

LU Decomposition constructor.

Parameters

Rectangular matrix

Returns

\Structure —

to access L, U and piv.

getL()

getL() : array

Get lower triangular factor.

Returns

array —

Lower triangular factor

getU()

getU() : array

Get upper triangular factor.

Returns

array —

Upper triangular factor

getPivot()

getPivot() : array

Return pivot permutation vector.

Returns

array —

Pivot vector

getDoublePivot()

getDoublePivot() : mixed

Alias for getPivot

Returns

mixed —

isNonsingular()

isNonsingular() : true

Is the matrix nonsingular?

Returns

true —

if U, and hence A, is nonsingular.

det()

det() : array

Count determinants

Returns

array —

d matrix deterninat

solve()

solve( $B) : \X

Solve A*X = B

Parameters

A Matrix with as many rows as A and any number of columns.

Returns

\X —

so that LUX = B(piv,:)

Inherited from: \PHPExcel_Shared_JAMA_LUDecomposition
Uses