Prototype

There is one prototype of getrf available, please see below.

getrf( MatrixA& a, VectorIPIV& ipiv );

Description

getrf (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SGETRF, DGETRF, CGETRF, and ZGETRF. getrf computes an LU factorization of a general M-by-N matrix A using partial pivoting with row interchanges.

The factorization has the form A = P * L * U 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).

This is the right-looking Level 3 BLAS version of the algorithm.

The selection of the LAPACK routine is done during compile-time, and is determined by the type of values contained in type MatrixA. The type of values is obtained through the value_type meta-function typename value_type<MatrixA>::type. The dispatching table below illustrates to which specific routine the code path will be generated.

Definition

Defined in header boost/numeric/bindings/lapack/computational/getrf.hpp.

Parameters or Requirements on Types

Complexity

Example

#include <boost/numeric/bindings/lapack/computational/getrf.hpp>
using namespace boost::numeric::bindings;

lapack::getrf( x, y, z );

this will output

[5] 0 1 2 3 4 5

Notes

See Also