JAMA

# Class: MagicSquareExample Source Location: /PHPExcel/Shared/JAMA/examples/MagicSquareExample.php
### Class Overview
Example of use of Matrix Class, featuring magic squares. | ### Methods magic main microtime_float
### Class Details [line 11] Example of use of Matrix Class, featuring magic squares. [ Top ] ### Class Methods ### method magic [line 17]
`void magic( int $n)`
Generate magic square test matrix. #### Parameters:
int | $n | n dimension of matrix
[ Top ] ### method main [line 100]
`void main( )`
Tests LU, QR, SVD and symmetric Eig decompositions. n = order of magic square. trace = diagonal sum, should be the magic sum, (n^3 + n)/2. max_eig = maximum eigenvalue of (A + A')/2, should equal trace. rank = linear algebraic rank, should equal n if n is odd, be less than n if n is even. cond = L_2 condition number, ratio of singular values. lu_res = test of LU factorization, norm1(L*U-A(p,:))/(n*eps). qr_res = test of QR factorization, norm1(Q*R-A)/(n*eps). [ Top ] ### method microtime_float [line 83]
`void microtime_float( )`
Simple function to replicate PHP 5 behaviour [ Top ] Documentation generated on Fri, 12 Oct 2012 00:24:35 +0200 by phpDocumentor 1.4.4