JAMA
[ class tree: JAMA ] [ index: JAMA ] [ all elements ]
Packages:
default
JAMA
Math_Stats
PHPExcel
PHPExcel_Calculation
PHPExcel_Cell
PHPExcel_Reader
PHPExcel_Reader_Excel5
PHPExcel_RichText
PHPExcel_Shared
PHPExcel_Shared_Escher
PHPExcel_Shared_OLE
PHPExcel_Style
PHPExcel_Worksheet
PHPExcel_Worksheet_Drawing
PHPExcel_Writer
PHPExcel_Writer_Excel5
PHPExcel_Writer_Excel2007


Files:
benchmark.php
CholeskyDecomposition.php
EigenvalueDecomposition.php
Error.php
LUDecomposition.php
MagicSquareExample.php
Maths.php
Matrix.php
QRDecomposition.php
SingularValueDecomposition.php

Classes:
Benchmark
CholeskyDecomposition
EigenvalueDecomposition
LUDecomposition
MagicSquareExample
Matrix
QRDecomposition
SingularValueDecomposition

Class: LUDecomposition

Source Location: /PHPExcel/Shared/JAMA/LUDecomposition.php

Class Overview








Author(s):


    
          
  • Michael Bommarito
    • 
              
  • Paul Meagher
    • 
              
  • Bartosz Matosiuk
    • 
                  





                
        

Version:


    
  
  • 1.1
    • 



        




Variables







Methods
























Class Details



[line 21]





Tags:





  

    author:  Michael Bommarito
  

  

    author:  Paul Meagher
  

  

    author:  Bartosz Matosiuk
  

  

    version:  1.1
  

  

    license:  PHP
  










[ Top ]







Class Variables



	
	

	
$LU = array()

	
[line 26]

  Decomposition storage

Decomposition storage


  

	

  

    

      Type:  
      array
    

      

	



	
[ Top ]


	
	

	
$m = 

	
[line 32]

  Row dimension.

Row dimension.


  

	

  

    

      Type:  
      int
    

      

	



	
[ Top ]


	
	

	
$n = 

	
[line 38]

  Column dimension.

Column dimension.


  

	

  

    

      Type:  
      int
    

      

	



	
[ Top ]


	
	

	
$piv = array()

	
[line 50]

  Internal storage of pivot vector.

Internal storage of pivot vector.


  

	

  

    

      Type:  
      array
    

      

	



	
[ Top ]


	
	

	
$pivsign = 

	
[line 44]

  Pivot sign.

Pivot sign.


  

	

  

    

      Type:  
      int
    

      

	



	
[ Top ]










Class Methods




  

	
	
constructor LUDecomposition [line 57]

	

    

    

		Structure LUDecomposition(
$A
$A)
    

    


	
		LU Decomposition constructor.

LU Decomposition constructor.





Tags:





  

    return:  to access L, U and piv.
  









	
        
Parameters:

    

    

          

        $A  
        $A  
        Rectangular matrix
      

        

    


        
[ Top ]

  

  

	
	
method det [line 177]

	

    

    

		array det(
)
    

    


	
		Count determinants

Count determinants





Tags:





  

    return:  d matrix deterninat
  









	
        
[ Top ]

  

  

	
	
method getDoublePivot [line 157]

	

    

    

		void getDoublePivot(
)
    

    


	
		Alias for getPivot

Alias for getPivot





Tags:





  

    see:  LUDecomposition::getPivot()
  









	
        
[ Top ]

  

  

	
	
method getL [line 115]

	

    

    

		array getL(
)
    

    


	
		Get lower triangular factor.

Get lower triangular factor.





Tags:





  

    return:  Lower triangular factor
  









	
        
[ Top ]

  

  

	
	
method getPivot [line 149]

	

    

    

		array getPivot(
)
    

    


	
		Return pivot permutation vector.

Return pivot permutation vector.





Tags:





  

    return:  Pivot vector
  









	
        
[ Top ]

  

  

	
	
method getU [line 133]

	

    

    

		array getU(
)
    

    


	
		Get upper triangular factor.

Get upper triangular factor.





Tags:





  

    return:  Upper triangular factor
  









	
        
[ Top ]

  

  

	
	
method isNonsingular [line 165]

	

    

    

		true isNonsingular(
)
    

    


	
		Is the matrix nonsingular?

Is the matrix nonsingular?





Tags:





  

    return:  if U, and hence A, is nonsingular.
  









	
        
[ Top ]

  

  

	
	
method solve [line 195]

	

    

    

		X solve(
$B
$B)
    

    


	
		Solve A*X = B

Solve A*X = B





Tags:





  

    return:  so that L*U*X = B(piv,:)
  

  

    exception:  IllegalArgumentException Matrix row dimensions must agree.
  

  

    exception:  RuntimeException  Matrix is singular.
  









	
        
Parameters:

    

    

          

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

        

    


        
[ Top ]

  






        

		    

		    Documentation generated on Mon, 05 Jan 2009 20:38:02 +0100 by phpDocumentor 1.4.1