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| HPL_idamax(3) | HPL Library Functions | HPL_idamax(3) |
NAME
HPL_idamax - 1st k s.t. |x_k| = max_i(|x_i|).SYNOPSIS
#include "hpl.h"int HPL_idamax( const int N, const double * X, const int INCX );
DESCRIPTION
HPL_idamax returns the index in an n-vector x of the first element having maximum absolute value.ARGUMENTS
- N (local input) const int
- On entry, N specifies the length of the vector x. N must be at least zero.
- X (local input) const double *
- On entry, X is an incremented array of dimension at least ( 1 + ( n - 1 ) * abs( INCX ) ) that contains the vector x.
- INCX (local input) const int
- On entry, INCX specifies the increment for the elements of X. INCX must not be zero.
EXAMPLE
#include "hpl.h"int main(int argc, char *argv[])
{
double x[3];
int imax;
x[0] = 1.0; x[1] = 3.0; x[2] = 2.0;
imax = HPL_idamax( 3, x, 1 );
printf("imax=%d\n", imax);
exit(0);
return(0);
}
SEE ALSO
HPL_daxpy (3), HPL_dcopy (3), HPL_dscal (3), HPL_dswap (3).| December 2, 2018 | HPL 2.3 |
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