DSDOT - Online Linux Manual Page

Section : 1
Updated : November 2008
Source : BLAS routine
Note : BLAS routine
NAMEDSDOT - accumulation and result
SYNOPSISDOUBLE PRECISION  FUNCTION DSDOT(N,SX,INCX,SY,INCY)  INTEGER INCX,INCY,N  REAL SX(*),SY(*)
PURPOSEprecision accumulation and result. Returns D.P. dot product accumulated in D.P., for S.P. SX and SY DSDOT = sum for I = 0 to N-1 of SX(LX+I*INCX) * SY(LY+I*INCY), where LX = 1 if INCX .GE. 0, else LX = 1+(1-N)*INCX, and LY is defined in a similar way using INCY.
ARGUMENTSN (input) INTEGER  number of elements in input vector(s) SX (input) REAL array, dimension(N)  single precision vector with N elements INCX (input) INTEGER  storage spacing between elements of SX SY (input) REAL array, dimension(N)  single precision vector with N elements INCY (input) INTEGER  storage spacing between elements of SY DSDOT (output) DOUBLE PRECISION  DSDOT double precision dot product (zero if N.LE.0)
FURTHER DETAILSREFERENCES

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.
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)
920310 Corrected definition of LX in DESCRIPTION. (WRB) 920501 Reformatted the REFERENCES section. (WRB)
070118 Reformat to LAPACK style (JL)
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