asum - Man Page
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(*)Definition at line 70 of file dasum.f.
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(*)Definition at line 71 of file dzasum.f.
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(*)Definition at line 71 of file sasum.f.
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(*)Definition at line 71 of file scasum.f.
Author
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