source: LMDZ6/branches/Amaury_dev/libf/phylmd/ran0_vec.F90 @ 5185

Last change on this file since 5185 was 5117, checked in by abarral, 5 months ago

rename modules properly lmdz_*
move some unused files to obsolete/
(lint) uppercase fortran keywords

  • Property copyright set to
    Name of program: LMDZ
    Creation date: 1984
    Version: LMDZ5
    License: CeCILL version 2
    Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
    See the license file in the root directory
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 676 bytes
Line 
1
2! $Header$
3
4SUBROUTINE ran0_vec(npoints, idum, ran0)
5
6  ! $Id: ran0_vec.F90 5117 2024-07-24 14:23:34Z abarral $
7  ! Platform independent random number generator from
8  ! Numerical Recipies
9  ! Mark Webb July 1999
10
11  IMPLICIT NONE
12
13  INTEGER j, npoints, idum(npoints), ia, im, iq, ir, k(npoints)
14  REAL ran0(npoints), am
15
16  PARAMETER (ia=16807, im=2147483647, am=1.0/im, iq=127773, ir=2836)
17
18  ! do j=1,npoints
19  ! if (idum(j).EQ.0) THEN
20  ! WRITE(6,*) 'idum=',idum
21  ! WRITE(6,*) 'ZERO seed not allowed'
22  ! stop
23  ! END IF
24  ! enddo
25
26  DO j = 1, npoints
27    k(j) = idum(j)/iq
28    idum(j) = ia*(idum(j)-k(j)*iq) - ir*k(j)
29    IF (idum(j)<0) idum(j) = idum(j) + im
30    ran0(j) = am*idum(j)
31  END DO
32
33END SUBROUTINE ran0_vec
34
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