cblas_?gthr

Syntax

void cblas_sgthr (const MKL_INT nz, const float *y, float *x, const MKL_INT *indx);

void cblas_dgthr (const MKL_INT nz, const double *y, double *x, const MKL_INT *indx);

void cblas_cgthr (const MKL_INT nz, const void *y, void *x, const MKL_INT *indx);

void cblas_zgthr (const MKL_INT nz, const void *y, void *x, const MKL_INT *indx);

Include Files

• mkl.h

Description

The ?gthr routines gather the specified elements of a full-storage sparse vector y into compressed form(nz, x, indx). The routines reference only the elements of y whose indices are listed in the array indx:

x[i] = y]indx[i]], for i=0,1,... ,nz-1.

Input Parameters

nz

The number of elements of y to be gathered.

indx

Specifies indices of elements to be gathered.

Array, size at least nz.

y

Array, size at least max(indx[i]).

Output Parameters

x

Array, size at least nz.

Contains the vector converted to the compressed form.