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| scal(3) | LAPACK | scal(3) |
NAME¶
scal - scal: x = alpha x
SYNOPSIS¶
Functions¶
subroutine cscal (n, ca, cx, incx)
CSCAL subroutine csscal (n, sa, cx, incx)
CSSCAL subroutine dscal (n, da, dx, incx)
DSCAL subroutine sscal (n, sa, sx, incx)
SSCAL subroutine zdscal (n, da, zx, incx)
ZDSCAL subroutine zscal (n, za, zx, incx)
ZSCAL
Detailed Description¶
Function Documentation¶
subroutine cscal (integer n, complex ca, complex, dimension(*) cx, integer incx)¶
CSCAL
Purpose:
CSCAL scales a vector by a constant.
Parameters
N is INTEGER
number of elements in input vector(s)
CA
CA is COMPLEX
On entry, CA specifies the scalar alpha.
CX
CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
INCX
INCX is INTEGER
storage spacing between elements of CX
Author
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(*)
subroutine csscal (integer n, real sa, complex, dimension(*) cx, integer incx)¶
CSSCAL
Purpose:
CSSCAL scales a complex vector by a real constant.
Parameters
N is INTEGER
number of elements in input vector(s)
SA
SA is REAL
On entry, SA specifies the scalar alpha.
CX
CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
INCX
INCX is INTEGER
storage spacing between elements of CX
Author
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(*)
subroutine dscal (integer n, double precision da, double precision, dimension(*) dx, integer incx)¶
DSCAL
Purpose:
DSCAL scales a vector by a constant.
uses unrolled loops for increment equal to 1.
Parameters
N is INTEGER
number of elements in input vector(s)
DA
DA is DOUBLE PRECISION
On entry, DA specifies the scalar alpha.
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 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(*)
subroutine sscal (integer n, real sa, real, dimension(*) sx, integer incx)¶
SSCAL
Purpose:
SSCAL scales a vector by a constant.
uses unrolled loops for increment equal to 1.
Parameters
N is INTEGER
number of elements in input vector(s)
SA
SA is REAL
On entry, SA specifies the scalar alpha.
SX
SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
INCX
INCX is INTEGER
storage spacing between elements of SX
Author
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(*)
subroutine zdscal (integer n, double precision da, complex*16, dimension(*) zx, integer incx)¶
ZDSCAL
Purpose:
ZDSCAL scales a vector by a constant.
Parameters
N is INTEGER
number of elements in input vector(s)
DA
DA is DOUBLE PRECISION
On entry, DA specifies the scalar alpha.
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 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(*)
subroutine zscal (integer n, complex*16 za, complex*16, dimension(*) zx, integer incx)¶
ZSCAL
Purpose:
ZSCAL scales a vector by a constant.
Parameters
N is INTEGER
number of elements in input vector(s)
ZA
ZA is COMPLEX*16
On entry, ZA specifies the scalar alpha.
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 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(*)
Author¶
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| Wed Feb 7 2024 11:30:40 | Version 3.12.0 |