mirror of
https://git.planet-casio.com/Lephenixnoir/OpenLibm.git
synced 2025-01-03 23:43:41 +01:00
37 lines
1.1 KiB
FortranFixed
37 lines
1.1 KiB
FortranFixed
|
*DECK DVNRMS
|
||
|
|
DOUBLE PRECISION FUNCTION DVNRMS (N, V, W)
|
||
|
|
C***BEGIN PROLOGUE DVNRMS
|
||
|
|
C***SUBSIDIARY
|
||
|
|
C***PURPOSE Subsidiary to DDEBDF
|
||
|
|
C***LIBRARY SLATEC
|
||
|
|
C***TYPE DOUBLE PRECISION (VNWRMS-S, DVNRMS-D)
|
||
|
|
C***AUTHOR (UNKNOWN)
|
||
|
|
C***DESCRIPTION
|
||
|
|
C
|
||
|
|
C DVNRMS computes a weighted root-mean-square vector norm for the
|
||
|
|
C integrator package DDEBDF.
|
||
|
|
C
|
||
|
|
C***SEE ALSO DDEBDF
|
||
|
|
C***ROUTINES CALLED (NONE)
|
||
|
|
C***REVISION HISTORY (YYMMDD)
|
||
|
|
C 820301 DATE WRITTEN
|
||
|
|
C 890531 Changed all specific intrinsics to generic. (WRB)
|
||
|
|
C 890831 Modified array declarations. (WRB)
|
||
|
|
C 890911 Removed unnecessary intrinsics. (WRB)
|
||
|
|
C 891214 Prologue converted to Version 4.0 format. (BAB)
|
||
|
|
C 900328 Added TYPE section. (WRB)
|
||
|
|
C***END PROLOGUE DVNRMS
|
||
|
|
INTEGER I, N
|
||
|
|
DOUBLE PRECISION SUM, V, W
|
||
|
|
DIMENSION V(*),W(*)
|
||
|
|
C***FIRST EXECUTABLE STATEMENT DVNRMS
|
||
|
|
SUM = 0.0D0
|
||
|
|
DO 10 I = 1, N
|
||
|
|
SUM = SUM + (V(I)/W(I))**2
|
||
|
|
10 CONTINUE
|
||
|
|
DVNRMS = SQRT(SUM/N)
|
||
|
|
RETURN
|
||
|
|
C ----------------------- END OF FUNCTION DVNRMS
|
||
|
|
C ------------------------
|
||
|
|
END
|