geqrf

Prototype

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

geqrf( MatrixA& a, VectorTAU& tau );

Description

geqrf (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SGEQRF, DGEQRF, CGEQRF, and ZGEQRF. geqrf computes a QR factorization of a complex M-by-N matrix A: A = Q * R.

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.

Table 1.195. Dispatching of geqrf

Value type of MatrixA	LAPACK routine
`float`	SGEQRF
`double`	DGEQRF
`complex<float>`	CGEQRF
`complex<double>`	ZGEQRF

Definition

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

Parameters or Requirements on Types

Parameters

MatrixA

The definition of term 1

MatrixB

The definition of term 2

MatrixC

The definition of term 3.

Definitions may contain paragraphs.

Complexity

Example

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

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

this will output

[5] 0 1 2 3 4 5