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unglq
Prototype

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

unglq( MatrixA& a, const VectorTAU& tau );

Description

unglq (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SORGLQ, DORGLQ, CUNGLQ, and ZUNGLQ. unglq generates an M-by-N complex matrix Q with orthonormal rows, which is defined as the first M rows of a product of K elementary reflectors of order N

Q = H(k)' . . . H(2)' H(1)'

as returned by ZGELQF.

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 1.207. Dispatching of unglq

Value type of MatrixA

LAPACK routine

float

SORGLQ

double

DORGLQ

complex<float>

CUNGLQ

complex<double>

ZUNGLQ


Definition

Defined in header boost/numeric/bindings/lapack/computational/unglq.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/unglq.hpp>
using namespace boost::numeric::bindings;

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

this will output

[5] 0 1 2 3 4 5

Notes
See Also

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