.TH "BLAS/SRC/dsdot.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
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.SH NAME
BLAS/SRC/dsdot.f
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "double precision function \fBdsdot\fP (n, sx, incx, sy, incy)"
.br
.RI "\fBDSDOT\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "double precision function dsdot (integer n, real, dimension(*) sx, integer incx, real, dimension(*) sy, integer incy)"

.PP
\fBDSDOT\fP 
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\fBPurpose:\fP
.RS 4

.PP
.nf
 Compute the inner product of two vectors with extended
 precision 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\&.
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.PP
 
.RE
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\fBParameters\fP
.RS 4
\fIN\fP 
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.nf
          N is INTEGER
         number of elements in input vector(s)
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\fISX\fP 
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.nf
          SX is REAL array, dimension(N)
         single precision vector with N elements
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\fIINCX\fP 
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.nf
          INCX is INTEGER
          storage spacing between elements of SX
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.PP
.br
\fISY\fP 
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.nf
          SY is REAL array, dimension(N)
         single precision vector with N elements
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.PP
.br
\fIINCY\fP 
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.nf
          INCY is INTEGER
         storage spacing between elements of SY
.fi
.PP
.RE
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\fBReturns\fP
.RS 4
DSDOT 
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.nf
          DSDOT is DOUBLE PRECISION
         DSDOT  double precision dot product (zero if N\&.LE\&.0)
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.PP
 
.RE
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\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 
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Univ\&. of California Berkeley 
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Univ\&. of Colorado Denver 
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NAG Ltd\&. 
.RE
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\fBFurther Details:\fP
.RS 4

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.nf
 
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.PP
 
.RE
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\fBReferences:\fP
.RS 4

.PP
.nf
  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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.RE
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.PP
Definition at line \fB118\fP of file \fBdsdot\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.