***PURPOSE Compute the inner product of two vectors.
***CATEGORY D1A4
***TYPE DOUBLE PRECISION (SDOT-S, DDOT-D, CDOTU-C)
***KEYWORDS BLAS, INNER PRODUCT, LINEAR ALGEBRA, 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)
DX double precision vector with N elements
INCX storage spacing between elements of DX
DY double precision vector with N elements
INCY storage spacing between elements of DY
--Output--
DDOT double precision dot product (zero if N .LE. 0)
Returns the dot product of double precision DX and DY.
DDOT = sum for I = 0 to N-1 of DX(LX+I*INCX) * DY(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.
***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)
920310 Corrected definition of LX in DESCRIPTION. (WRB)
920501 Reformatted the REFERENCES section. (WRB)
***END PROLOGUE DDOT
***FIRST EXECUTABLE STATEMENT DDOT
Namespace: Altaxo.Calc.Ode.Obsolete.DVodeAssembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3179.0 (4.8.3179.0)
Syntax public double Run(
int N,
double[] DX,
int offset_dx,
int INCX,
double[] DY,
int offset_dy,
int INCY
)
Parameters
- N Int32
-
number of elements in input vector(s)
- DX Double
-
double precision vector with N elements
- offset_dx Int32
[Missing <param name="offset_dx"/> documentation for "M:Altaxo.Calc.Ode.Obsolete.DVode.DDOT.Run(System.Int32,System.Double[],System.Int32,System.Int32,System.Double[],System.Int32,System.Int32)"]
- INCX Int32
-
storage spacing between elements of DX
DY double precision vector with N elements
- DY Double
-
double precision vector with N elements
- offset_dy Int32
[Missing <param name="offset_dy"/> documentation for "M:Altaxo.Calc.Ode.Obsolete.DVode.DDOT.Run(System.Int32,System.Double[],System.Int32,System.Int32,System.Double[],System.Int32,System.Int32)"]
- INCY Int32
-
storage spacing between elements of DY
Return Value
Double[Missing <returns> documentation for "M:Altaxo.Calc.Ode.Obsolete.DVode.DDOT.Run(System.Int32,System.Double[],System.Int32,System.Int32,System.Double[],System.Int32,System.Int32)"]
See Also