Man page - rscl(3)

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Manual

rscl

NAME
SYNOPSIS
Functions
Detailed Description
Function Documentation
subroutine csrscl (integer n, real sa, complex, dimension( * ) sx, integerincx)
subroutine drscl (integer n, double precision sa, double precision,dimension( * ) sx, integer incx)
subroutine srscl (integer n, real sa, real, dimension( * ) sx, integerincx)
subroutine zdrscl (integer n, double precision sa, complex*16, dimension( *) sx, integer incx)
Author

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, integerincx)

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

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 Tennessee

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

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 Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

subroutine srscl (integer n, real sa, real, dimension( * ) sx, integerincx)

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

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 Tennessee

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

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 Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Author

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