Prototype

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

gbcon( const char norm, const MatrixAB& ab, const VectorIPIV& ipiv,
        const Scalar >, Scalar > );

Description

gbcon (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SGBCON, DGBCON, CGBCON, and ZGBCON. gbcon estimates the reciprocal of the condition number of a complex general band matrix A, in either the 1-norm or the infinity-norm, using the LU factorization computed by ZGBTRF.

An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / ( norm(A) * norm(inv(A)) ).

The selection of the LAPACK routine is done during compile-time, and is determined by the type of values contained in type MatrixAB. The type of values is obtained through the value_type meta-function typename value_type<MatrixAB>::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/gbcon.hpp.

Parameters or Requirements on Types

Complexity

Example

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

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

this will output

[5] 0 1 2 3 4 5

Notes

See Also