iamax(3)

Library Functions Manual

iamax(3)

NAME

iamax - iamax: argmax_i | real( x_i ) | + | imag( x_i ) |

SYNOPSIS

Functions

integer function icamax (n, cx, incx)
ICAMAX integer function idamax (n, dx, incx)
IDAMAX integer function isamax (n, sx, incx)
ISAMAX integer function izamax (n, zx, incx)
IZAMAX

Detailed Description

Function Documentation

integer function icamax (integer n, complex, dimension(*) cx, integer incx)

ICAMAX

Purpose:

!>
!>    ICAMAX finds the index of the first element having maximum |Re(.)| + |Im(.)|
!>

Parameters

!>          N is INTEGER
!>         number of elements in input vector(s)
!>

!>          CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>

INCX

!>          INCX is INTEGER
!>         storage spacing between elements of CX
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

!>
!>     jack dongarra, linpack, 3/11/78.
!>     modified 3/93 to return if incx .le. 0.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>

Definition at line 70 of file icamax.f.

integer function idamax (integer n, double precision, dimension(*) dx, integer incx)

IDAMAX

Purpose:

!>
!>    IDAMAX finds the index of the first element having maximum absolute value.
!>

Parameters

!>          N is INTEGER
!>         number of elements in input vector(s)
!>

!>          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>

INCX

!>          INCX is INTEGER
!>         storage spacing between elements of DX
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

!>
!>     jack dongarra, linpack, 3/11/78.
!>     modified 3/93 to return if incx .le. 0.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>

Definition at line 70 of file idamax.f.

integer function isamax (integer n, real, dimension(*) sx, integer incx)

ISAMAX

Purpose:

!>
!>    ISAMAX finds the index of the first element having maximum absolute value.
!>

Parameters

!>          N is INTEGER
!>         number of elements in input vector(s)
!>

!>          SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>

INCX

!>          INCX is INTEGER
!>         storage spacing between elements of SX
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

!>
!>     jack dongarra, linpack, 3/11/78.
!>     modified 3/93 to return if incx .le. 0.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>

Definition at line 70 of file isamax.f.

integer function izamax (integer n, complex16, dimension() zx, integer incx)

IZAMAX

Purpose:

!>
!>    IZAMAX finds the index of the first element having maximum |Re(.)| + |Im(.)|
!>

Parameters

!>          N is INTEGER
!>         number of elements in input vector(s)
!>

!>          ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
!>

INCX

!>          INCX is INTEGER
!>         storage spacing between elements of ZX
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

!>
!>     jack dongarra, 1/15/85.
!>     modified 3/93 to return if incx .le. 0.
!>     modified 12/3/93, array(1) declarations changed to array(*)
!>

Definition at line 70 of file izamax.f.

Author

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