File: dbdiff.f

package info (click to toggle)
scilab 4.0-12
  • links: PTS
  • area: non-free
  • in suites: etch, etch-m68k
  • size: 100,640 kB
  • ctags: 57,333
  • sloc: ansic: 377,889; fortran: 242,862; xml: 179,819; tcl: 42,062; sh: 10,593; ml: 9,441; makefile: 4,377; cpp: 1,354; java: 621; csh: 260; yacc: 247; perl: 130; lex: 126; asm: 72; lisp: 30
file content (37 lines) | stat: -rw-r--r-- 999 bytes parent folder | download | duplicates (13) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
*DECK DBDIFF
      SUBROUTINE DBDIFF (L, V)
C***BEGIN PROLOGUE  DBDIFF
C***SUBSIDIARY
C***PURPOSE  Subsidiary to DBSKIN
C***LIBRARY   SLATEC
C***TYPE      DOUBLE PRECISION (BDIFF-S, DBDIFF-D)
C***AUTHOR  Amos, D. E., (SNLA)
C***DESCRIPTION
C
C     DBDIFF computes the sum of B(L,K)*V(K)*(-1)**K where B(L,K)
C     are the binomial coefficients.  Truncated sums are computed by
C     setting last part of the V vector to zero. On return, the binomial
C     sum is in V(L).
C
C***SEE ALSO  DBSKIN
C***ROUTINES CALLED  (NONE)
C***REVISION HISTORY  (YYMMDD)
C   820601  DATE WRITTEN
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C   900328  Added TYPE section.  (WRB)
C***END PROLOGUE  DBDIFF
C
      INTEGER I, J, K, L
      DOUBLE PRECISION V
      DIMENSION V(*)
C***FIRST EXECUTABLE STATEMENT  DBDIFF
      IF (L.EQ.1) RETURN
      DO 20 J=2,L
        K = L
        DO 10 I=J,L
          V(K) = V(K-1) - V(K)
          K = K - 1
   10   CONTINUE
   20 CONTINUE
      RETURN
      END