Prototype

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

stevx( const char jobz, const char range, const int_t n,
        VectorD& d, VectorE& e, const Scalar >, const Scalar >,
        const int_t il, const int_t iu,
        const Scalar >, int_t& m, VectorW& w, MatrixZ& z,
        VectorIFAIL& ifail );

Description

stevx (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SSTEVX and DSTEVX. stevx computes selected eigenvalues and, optionally, eigenvectors of a real symmetric tridiagonal matrix A. Eigenvalues and eigenvectors can be selected by specifying either a range of values or a range of indices for the desired eigenvalues.

The selection of the LAPACK routine is done during compile-time, and is determined by the type of values contained in type VectorD. The type of values is obtained through the value_type meta-function typename value_type<VectorD>::type. The dispatching table below illustrates to which specific routine the code path will be generated.

Definition

Defined in header boost/numeric/bindings/lapack/driver/stevx.hpp.

Parameters or Requirements on Types

Complexity

Example

#include <boost/numeric/bindings/lapack/driver/stevx.hpp>
using namespace boost::numeric::bindings;

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

this will output

[5] 0 1 2 3 4 5

Notes

See Also