iamax(3) LAPACK iamax(3)

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


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

ICAMAX

Purpose:

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

Parameters

N 

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

CX

          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(*)

IDAMAX

Purpose:

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

Parameters

N 

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

DX

          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(*)

ISAMAX

Purpose:

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

Parameters

N 

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

SX

          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(*)

IZAMAX

Purpose:

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

Parameters

N 

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

ZX

          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(*)

Generated automatically by Doxygen for LAPACK from the source code.

Fri Aug 9 2024 02:33:22 Version 3.12.0