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DDOTRun Method

***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.DVode
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3179.0 (4.8.3179.0)
Syntax
C#
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