Man page - asum(3)

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Manual

asum

NAME
SYNOPSIS
Functions
Detailed Description
Function Documentation
double precision function dasum (integer n, double precision, dimension(*)dx, integer incx)
double precision function dzasum (integer n, complex*16, dimension(*) zx,integer incx)
real function sasum (integer n, real, dimension(*) sx, integer incx)
real function scasum (integer n, complex, dimension(*) cx, integer incx)
Author

NAME

asum - asum: sum | real( x_i ) | + | imag( x_i ) |

SYNOPSIS

Functions

double precision function dasum (n, dx, incx)
DASUM

double precision function dzasum (n, zx, incx)
DZASUM

real function sasum (n, sx, incx)
SASUM

real function scasum (n, cx, incx)
SCASUM

Detailed Description

Function Documentation

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

DASUM

Purpose:

DASUM takes the sum of the absolute values.

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(*)

double precision function dzasum (integer n, complex*16, dimension(*) zx,integer incx)

DZASUM

Purpose:

DZASUM takes the sum of the (|Re(.)| + |Im(.)|)’s of a complex vector and
returns a double precision result.

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

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

SASUM

Purpose:

SASUM takes the sum of the absolute values.
uses unrolled loops for increment equal to one.

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(*)

real function scasum (integer n, complex, dimension(*) cx, integer incx)

SCASUM

Purpose:

SCASUM takes the sum of the (|Re(.)| + |Im(.)|)’s of a complex vector and
returns a single precision result.

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 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(*)

Author

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