Prototype

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

ppcon( const MatrixAP& ap, const Scalar >, Scalar > );

Description

ppcon (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SPPCON, DPPCON, CPPCON, and ZPPCON. ppcon estimates the reciprocal of the condition number (in the 1-norm) of a complex Hermitian positive definite packed matrix using the Cholesky factorization A = U**H*U or A = LL*H computed by ZPPTRF.

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 MatrixAP. The type of values is obtained through the value_type meta-function typename value_type<MatrixAP>::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/ppcon.hpp.

Parameters or Requirements on Types

Complexity

Example

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

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

this will output

[5] 0 1 2 3 4 5

Notes

See Also