# rscl - Man Page

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.

## 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

```          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

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

```          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

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

```          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

NAG Ltd.

Definition at line 83 of file srscl.f.

### 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