Prototype

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

pocon( const MatrixA& a, const Scalar >, Scalar > );

Description

pocon (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SPOCON, DPOCON, CPOCON, and ZPOCON. pocon estimates the reciprocal of the condition number (in the 1-norm) of a complex Hermitian positive definite matrix using the Cholesky factorization A = U**H*U or A = LL*H computed by ZPOTRF.

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

Parameters or Requirements on Types

Complexity

Example

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

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

this will output

[5] 0 1 2 3 4 5

Notes

See Also