SSCAL(3)

SYNOPSIS
SUBROUTINE SSCAL (N, SA, SX, INCX)

NAME
sscal - Multiply a vector by a constant.

LIBRARY
SLATEC (BLAS)

CATEGORY
D1A6

TYPE
SINGLE PRECISION (SSCAL-S, DSCAL-D, CSCAL-C)

KEYWORDS
BLAS, LINEAR ALGEBRA, SCALE, VECTOR

AUTHOR
Lawson, C. L., (JPL) Hanson, R. J., (SNLA) Kincaid, D. R., (U. of Texas) Krogh, F. T., (JPL)

DESCRIPTION
B L A S Subprogram Description of Parameters --Input-- N number of elements in input vector(s) SA single precision scale factor SX single precision vector with N elements INCX storage spacing between elements of SX --Output-- SX single precision result (unchanged if N .LE. 0) Replace single precision SX by single precision SA*SX. For I = 0 to N-1, replace SX(IX+I*INCX) with SA * SX(IX+I*INCX), where IX = 1 if INCX .GE. 0, else IX = 1+(1-N)*INCX.

REFERENCES
C. L. Lawson, R. J. Hanson, D. R. Kincaid and F. T. Krogh, Basic linear algebra subprograms for Fortran usage, Algorithm No. 539, Transactions on Mathematical Software 5, 3 (September 1979), pp. 308-323.

ROUTINES CALLED
(NONE)

REVISION HISTORY (YYMMDD)
791001 DATE WRITTEN
890831 Modified array declarations. (WRB)
890831 REVISION DATE from Version 3.2
891214 Prologue converted to Version 4.0 format. (BAB)
900821 Modified to correct problem with a negative increment. (WRB)
920501 Reformatted the REFERENCES section. (WRB)