f07adf

f07adf © Numerical Algorithms Group, 2002.

Purpose

F07ADF LU factorization of real m by n matrix (SGETRF/DGETRF)

Synopsis

[a,ipiv,info] = f07adf(a)

Description

 
 This routine forms the LU factorization of a real m by n matrix A
 as A=PLU, where P is a permutation matrix, L is lower triangular 
 with unit diagonal elements (lower trapezoidal if m>n) and U is 
 upper triangular (upper trapezoidal if m<n). Usually A is square 
 (m=n), and both L and U are triangular. The routine uses partial 
 pivoting, with row interchanges.

Parameters

f07adf

Required Input Arguments:

a (:,:)                               real

Output Arguments:

a (:,:)                               real
ipiv (:)                              integer
info                                  integer