Prototype

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

stedc( const char compz, VectorD& d, VectorE& e, MatrixZ& z );

Description

stedc (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SSTEDC, DSTEDC, CSTEDC, and ZSTEDC. stedc computes all eigenvalues and, optionally, eigenvectors of a symmetric tridiagonal matrix using the divide and conquer method. The eigenvectors of a full or band complex Hermitian matrix can also be found if ZHETRD or ZHPTRD or ZHBTRD has been used to reduce this matrix to tridiagonal form.

This code makes very mild assumptions about floating point arithmetic. It will work on machines with a guard digit in add/subtract, or on those binary machines without guard digits which subtract like the Cray X-MP, Cray Y-MP, Cray C-90, or Cray-2. It could conceivably fail on hexadecimal or decimal machines without guard digits, but we know of none. See DLAED3 for details.

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/computational/stedc.hpp.

Parameters or Requirements on Types

Complexity

Example

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

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

this will output

[5] 0 1 2 3 4 5

Notes

See Also