There is one prototype of spr
available, please see below.
spr( const Scalar >, const VectorX& x, MatrixAP& ap );
spr
(short for symmetric,
packed, rank-1 update) provides a C++ interface to BLAS routines SSPR
and DSPR. spr
performs
the symmetric rank 1 operation
A := alpha*x*x' + A,
where alpha is a real scalar, x is an n element vector and A is an n by n symmetric matrix, supplied in packed form.
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 1.62. Dispatching of spr.
Value type of VectorX |
BLAS routine |
CBLAS routine |
CUBLAS routine |
---|---|---|---|
|
SSPR |
cblas_sspr |
cublasSspr |
|
DSPR |
cblas_dspr |
Unavailable |
The original routines SSPR and DSPR have six arguments, whereas spr
requires three arguments.
Defined in header boost/numeric/bindings/blas/level2/spr.hpp
.
Parameters
The definition of term 1
The definition of term 2
The definition of term 3.
Definitions may contain paragraphs.
#include <boost/numeric/bindings/blas/level2/spr.hpp> using namespace boost::numeric::bindings; blas::spr( x, y, z );
this will output
[5] 0 1 2 3 4 5