rscl(3)

Library Functions Manual

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 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 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.

Definition at line 83 of file csrscl.f.

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 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 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.

Definition at line 83 of file drscl.f.

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 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 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.

Definition at line 83 of file srscl.f.

subroutine zdrscl (integer n, double precision sa, complex16, 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 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 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.

Definition at line 83 of file zdrscl.f.

Author

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