***PURPOSE Find the smallest index of that component of a vector
having the maximum magnitude.
***CATEGORY D1A2
***TYPE DOUBLE PRECISION (ISAMAX-S, IDAMAX-D, ICAMAX-C)
***KEYWORDS BLAS, LINEAR ALGEBRA, MAXIMUM COMPONENT, 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
--Output--
IDAMAX smallest index (zero if N .LE. 0)
Find smallest index of maximum magnitude of double precision DX.
IDAMAX = first I, I = 1 to N, to maximize ABS(DX(IX+(I-1)*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
890531 Changed all specific intrinsics to generic. (WRB)
890531 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)
***END PROLOGUE IDAMAX
***FIRST EXECUTABLE STATEMENT IDAMAX
Namespace: Altaxo.Calc.Ode.Obsolete.DVodeAssembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3179.0 (4.8.3179.0)
Syntax public int Run(
int N,
double[] DX,
int offset_dx,
int INCX
)
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.IDAMAX.Run(System.Int32,System.Double[],System.Int32,System.Int32)"]
- INCX Int32
-
storage spacing between elements of DX
Return Value
Int32[Missing <returns> documentation for "M:Altaxo.Calc.Ode.Obsolete.DVode.IDAMAX.Run(System.Int32,System.Double[],System.Int32,System.Int32)"]
See Also