##### gecon

###### Prototype

There is one prototype of `gecon` available, please see below.

    gecon( const char norm, const MatrixA& a, const Scalar >, Scalar > );

###### Description

`gecon` (short for $FRIENDLY_NAME) provides a C++ interface to LAPACK routines SGECON, DGECON, CGECON, and ZGECON. `gecon` estimates the reciprocal of the condition number of a general complex matrix A, in either the 1-norm or the infinity-norm, using the LU factorization computed by ZGETRF.

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 `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.

Table 1.243. Dispatching of gecon

Value type of MatrixA | LAPACK routine
--- | ---
`float` | SGECON
`double` | DGECON
`complex<float>` | CGECON
`complex<double>` | ZGECON

###### Definition

Defined in header `boost/numeric/bindings/lapack/computational/gecon.hpp`.

###### Parameters or Requirements on Types

Parameters

MatrixA

  The definition of term 1

MatrixB

  The definition of term 2

MatrixC

  The definition of term 3.

  Definitions may contain paragraphs.

###### Complexity

###### Example

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

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

this will output

    [5] 0 1 2 3 4 5

###### Notes

###### See Also

- Originating Fortran source files sgecon.f, dgecon.f, cgecon.f, and zgecon.f at Netlib.