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man pages->IRIX man pages -> libblas/amax (3)
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### Contents

```
I_AMAX(3F)							    I_AMAX(3F)

```

### NAME[Toc][Back]

```     idamax, isamax, izamax, icamax - BLAS Maximum index functions

FORTRAN	77 SYNOPSIS
integer function idamax( n, x, incx )
integer	       incx, n
double precision  x( 1 )

integer function isamax( n, x, incx )
integer	      incx, n
real	      x( 1 )

integer function izamax( n, x, incx )
integer	      incx, n
complex*16	      x( 1 )

integer function icamax( n, x, incx )
integer	      incx, n
complex	      x( 1 )

```

### C SYNOPSIS[Toc][Back]

```     Integer idamax( n,	x, incx	)
Integer	       incx, n;
double	       (*x)[ n ];

Integer isamax( n,	x, incx	)
Integer	      incx, n;
float	      (*x)[ n ];

Integer izamax( n,	x, incx	)
Integer	      incx, n;
Zomplex	      (*x)[ n ];

Integer icamax( n,	x, incx	)
Integer	      incx, n;
Complex	      (*x)[ n ];

```

### DESCRIPTION[Toc][Back]

```     idamax, isamax, izamax, and icamax, return	the index of the maximum value
of	vector x.  The vector x	has length n and increment incx.
For izamax	and icamax , the norm of each value is taken as:

Abs(	Real( x(i) ) ) + Abs( Imag( x(i) ) )

```

### AUTHOR[Toc][Back]

```	  Jack Dongarra, linpack, 3/11/78.

PPPPaaaaggggeeee 1111```
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