NAME

qr_decompose - Decomposes a matrix into the product of an orthonormal matrix (Q) and an

SYNOPSIS

#include "n/n_qr.h"

Example compile flags (system dependent):
  -DLINUX_X86_64 -DLINUX_X86_64_OPTERON  -DGNU_COMPILER 
   -I/home/kobus/include
   -L/home/kobus/misc/load/linux_x86_64_opteron -L/usr/lib/x86_64-linux-gnu
  -lKJB                               -lfftw3  -lgsl -lgslcblas -ljpeg  -lSVM -lstdc++                    -lpthread -lSLATEC -lg2c    -lacml -lacml_mv -lblas -lg2c      -lncursesw 


int qr_decompose
(
	const Matrix *mp,
	Matrix **Q_mpp,
	Matrix **R_mpp
);

DESCRIPTION

upper-triangular matrix (R). Given an m x n matrix A, this routine computes A = Q*R, where Q is an m x m orthonormal matrix, and and R is an m x n upper-triangular matrix. If m < n, R will actually be upper-trapezoidal; if m > n, rows m+1:n of R will be zero.

RETURNS

NO_ERROR on success, and ERROR on failure, with an appropriate error message being set.

NOTE

This routine requires that that the LAPACK library is available. If this file was compiled without the presence of that library, then this routine will return ERROR.

DISCLAIMER

This software is not adequatedly tested. It is recomended that results are checked independantly where appropriate.

AUTHOR

Kyle Simek

DOCUMENTER

Kobus Barnard