iamax(3) LAPACK 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
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(*)
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
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(*)
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
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(*)
integer function izamax (integer n, complex*16, dimension(*) zx, integer
incx)
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(*)
Author
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