1HPL_idamax(3)                HPL Library Functions               HPL_idamax(3)
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NAME

6       HPL_idamax - 1st k s.t. |x_k| = max_i(|x_i|).
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SYNOPSIS

9       #include "hpl.h"
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11       int HPL_idamax( const int N, const double * X, const int INCX );
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DESCRIPTION

14       HPL_idamax  returns   the index in an n-vector  x  of the first element
15       having maximum absolute value.
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ARGUMENTS

18       N       (local input)           const int
19               On entry, N specifies the length of the vector x. N   must   be
20               at least zero.
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22       X       (local input)           const double *
23               On entry,  X  is an incremented array of dimension  at  least (
24               1 + ( n - 1 ) * abs( INCX ) )  that  contains the vector x.
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26       INCX    (local input)           const int
27               On entry, INCX specifies the increment for the elements  of  X.
28               INCX must not be zero.
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EXAMPLE

31       #include "hpl.h"
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33       int main(int argc, char *argv[])
34       {
35          double x[3];
36          int    imax;
37          x[0] = 1.0; x[1] = 3.0; x[2] = 2.0;
38          imax = HPL_idamax( 3, x, 1 );
39          printf("imax=%d\n", imax);
40          exit(0);
41          return(0);
42       }
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SEE ALSO

45       HPL_daxpy (3), HPL_dcopy (3), HPL_dscal (3), HPL_dswap (3).
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49HPL 2.2                        February 24, 2016                 HPL_idamax(3)
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