2. EL 7
  3. lapack
  4. SRSCL(3)

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srscl.f(3) LAPACK srscl.f(3)

NAME

srscl.f -

SYNOPSIS

Functions/Subroutines


subroutine srscl (N, SA, SX, INCX)
SRSCL multiplies a vector by the reciprocal of a real scalar.

Function/Subroutine Documentation

subroutine srscl (integerN, realSA, 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.

Date:

September 2012

Definition at line 85 of file srscl.f.

Author

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Tue Sep 25 2012 Version 3.4.2