# imax1 - Man Page

imax1: argmax_i | x_i | (in LAPACK)

## Synopsis

### Functions

integer function icmax1 (n, cx, incx)
ICMAX1 finds the index of the first vector element of maximum absolute value.
integer function izmax1 (n, zx, incx)
IZMAX1 finds the index of the first vector element of maximum absolute value.

## Function Documentation

### integer function icmax1 (integer n, complex, dimension(*) cx, integer incx)

ICMAX1 finds the index of the first vector element of maximum absolute value.

Purpose:

``` ICMAX1 finds the index of the first vector element of maximum absolute value.

Based on ICAMAX from Level 1 BLAS.
The change is to use the 'genuine' absolute value.```
Parameters

N

```          N is INTEGER
The number of elements in the vector CX.```

CX

```          CX is COMPLEX array, dimension (N)
The vector CX. The ICMAX1 function returns the index of its first
element of maximum absolute value.```

INCX

```          INCX is INTEGER
The spacing between successive values of CX.  INCX >= 1.```
Author

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Contributors:

Nick Higham for use with CLACON.

Definition at line 80 of file icmax1.f.

### integer function izmax1 (integer n, complex*16, dimension(*) zx, integer incx)

IZMAX1 finds the index of the first vector element of maximum absolute value.

Purpose:

``` IZMAX1 finds the index of the first vector element of maximum absolute value.

Based on IZAMAX from Level 1 BLAS.
The change is to use the 'genuine' absolute value.```
Parameters

N

```          N is INTEGER
The number of elements in the vector ZX.```

ZX

```          ZX is COMPLEX*16 array, dimension (N)
The vector ZX. The IZMAX1 function returns the index of its first
element of maximum absolute value.```

INCX

```          INCX is INTEGER
The spacing between successive values of ZX.  INCX >= 1.```
Author

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Contributors:

Nick Higham for use with ZLACON.

Definition at line 80 of file izmax1.f.

## Author

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## Info

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK