##### scal

###### Prototype

There are two prototypes of `scal` available, please see below.

    scal( const Scalar >, VectorX& x );

    scal( const ScalarA a, VectorX& x );

###### Description

`scal` (short for scale) provides a C++ interface to BLAS routines SSCAL, DSCAL, CSSCAL, ZDSCAL, CSCAL, and ZSCAL.

The selection of the BLAS routine is done during compile-time, and is determined by the type of values contained in type `VectorX`. The type of values is obtained through the `value_type` meta-function `typename value_type<VectorX>::type`. Table X below illustrates to which specific routine this dispatching will take place.

Table 1.28. Dispatching of scal.

Value type of VectorX | BLAS routine | CBLAS routine | CUBLAS routine
--- | --- | --- | ---
`float` | SSCAL | cblas_sscal | cublasSscal
`double` | DSCAL | cblas_dscal | cublasDscal
`combined float and complex<float>` | CSSCAL | cblas_csscal | cublasCsscal
`combined double and complex<double>` | ZDSCAL | cblas_zdscal | Unavailable
`complex<float>` | CSCAL | cblas_cscal | cublasCscal
`complex<double>` | ZSCAL | cblas_zscal | cublasZscal

The original routines SSCAL, DSCAL, CSSCAL, ZDSCAL, CSCAL, and ZSCAL have four arguments, whereas `scal` requires two arguments.

Table 1.29. Deduction of arguments of scal.

###### Definition

Defined in header `boost/numeric/bindings/blas/level1/scal.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/blas/level1/scal.hpp>
    using namespace boost::numeric::bindings;

    blas::scal( x, y, z );

this will output

    [5] 0 1 2 3 4 5

###### Notes

###### See Also

- Originating Fortran source files sscal.f, dscal.f, csscal.f, zdscal.f, cscal.f, and zscal.f at Netlib.