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AIX Version 4.3 Base Operating System and Extensions Technical Reference, Volume 2
ISAMAX, IDAMAX, ICAMAX, or IZAMAX Function
Purpose
Finds the index of element having maximum absolute value.
Library
BLAS Library (libblas.a)
FORTRAN Syntax
INTEGER FUNCTION ISAMAX(N,X,INCX)
INTEGER INCX,N
REAL X(*)
INTEGER FUNCTION IDAMAX(N,X,INCX)
INTEGER INCX,N
DOUBLE PRECISION X(*)
INTEGER FUNCTION ICAMAX(N,X,INCX)
INTEGER INCX,N
COMPLEX X(*)
INTEGER FUNCTION IZAMAX(N,X,INCX)
INTEGER INCX,N
COMPLEX*16 X(*)
Description
The ISAMAX, IDAMAX, ICAMAX, or IZAMAX function returns the index of element having maximum absolute value.
Parameters
| N |
On entry, N specifies the number of elements in X and Y; unchanged on exit. |
| X |
Vector of dimension at least (1 + (N-1) * abs(INCX) ); unchanged on exit. |
| INCX |
On entry, INCX specifies the increment for the elements of X; unchanged on exit. |
Error Codes
For values of N <= 0, a value of 0 is returned.
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