table of contents
| rscl(3) | LAPACK | rscl(3) |
NAME¶
rscl - rscl: scale vector by reciprocal
SYNOPSIS¶
Functions¶
subroutine csrscl (n, sa, sx, incx)
CSRSCL multiplies a vector by the reciprocal of a real scalar.
subroutine drscl (n, sa, sx, incx)
DRSCL multiplies a vector by the reciprocal of a real scalar.
subroutine srscl (n, sa, sx, incx)
SRSCL multiplies a vector by the reciprocal of a real scalar.
subroutine zdrscl (n, sa, sx, incx)
ZDRSCL multiplies a vector by the reciprocal of a real scalar.
Detailed Description¶
Function Documentation¶
subroutine csrscl (integer n, real sa, complex, dimension( * ) sx, integer incx)¶
CSRSCL multiplies a vector by the reciprocal of a real scalar.
Purpose:
CSRSCL multiplies an n-element complex vector x by the real scalar
1/a. This is done without overflow or underflow as long as
the final result x/a does not overflow or underflow.
Parameters
N is INTEGER
The number of components of the vector x.
SA
SA is REAL
The scalar a which is used to divide each component of x.
SA must be >= 0, or the subroutine will divide by zero.
SX
SX is COMPLEX array, dimension
(1+(N-1)*abs(INCX))
The n-element vector x.
INCX
INCX is INTEGER
The increment between successive values of the vector SX.
> 0: SX(1) = X(1) and SX(1+(i-1)*INCX) = x(i), 1< i<= n
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
subroutine drscl (integer n, double precision sa, double precision, dimension( * ) sx, integer incx)¶
DRSCL multiplies a vector by the reciprocal of a real scalar.
Purpose:
DRSCL multiplies an n-element real vector x by the real scalar 1/a.
This is done without overflow or underflow as long as
the final result x/a does not overflow or underflow.
Parameters
N is INTEGER
The number of components of the vector x.
SA
SA is DOUBLE PRECISION
The scalar a which is used to divide each component of x.
SA must be >= 0, or the subroutine will divide by zero.
SX
SX is DOUBLE PRECISION array, dimension
(1+(N-1)*abs(INCX))
The n-element vector x.
INCX
INCX is INTEGER
The increment between successive values of the vector SX.
> 0: SX(1) = X(1) and SX(1+(i-1)*INCX) = x(i), 1< i<= n
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
subroutine srscl (integer n, real sa, real, dimension( * ) sx, integer incx)¶
SRSCL multiplies a vector by the reciprocal of a real scalar.
Purpose:
SRSCL multiplies an n-element real vector x by the real scalar 1/a.
This is done without overflow or underflow as long as
the final result x/a does not overflow or underflow.
Parameters
N is INTEGER
The number of components of the vector x.
SA
SA is REAL
The scalar a which is used to divide each component of x.
SA must be >= 0, or the subroutine will divide by zero.
SX
SX is REAL array, dimension
(1+(N-1)*abs(INCX))
The n-element vector x.
INCX
INCX is INTEGER
The increment between successive values of the vector SX.
> 0: SX(1) = X(1) and SX(1+(i-1)*INCX) = x(i), 1< i<= n
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
subroutine zdrscl (integer n, double precision sa, complex*16, dimension( * ) sx, integer incx)¶
ZDRSCL multiplies a vector by the reciprocal of a real scalar.
Purpose:
ZDRSCL multiplies an n-element complex vector x by the real scalar
1/a. This is done without overflow or underflow as long as
the final result x/a does not overflow or underflow.
Parameters
N is INTEGER
The number of components of the vector x.
SA
SA is DOUBLE PRECISION
The scalar a which is used to divide each component of x.
SA must be >= 0, or the subroutine will divide by zero.
SX
SX is COMPLEX*16 array, dimension
(1+(N-1)*abs(INCX))
The n-element vector x.
INCX
INCX is INTEGER
The increment between successive values of the vector SX.
> 0: SX(1) = X(1) and SX(1+(i-1)*INCX) = x(i), 1< i<= n
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Author¶
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