Last change
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This commit was manufactured by cvs2svn to create tag
'IPSL-CM4_LJ29'.
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Author Date Id Revision
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File size:
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1 | subroutine ran0_vec(npoints,idum,ran0) |
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2 | |
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3 | ! $Id: ran0_vec.F 494 2004-03-03 14:57:18Z jyg $ |
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4 | ! Platform independent random number generator from |
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5 | ! Numerical Recipies |
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6 | ! Mark Webb July 1999 |
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7 | |
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8 | implicit none |
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9 | |
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10 | integer j,npoints,idum(npoints),IA,IM,IQ,IR,k(npoints) |
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11 | real ran0(npoints),AM |
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12 | |
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13 | parameter (IA=16807, IM=2147483647, AM=1.0/IM, IQ=127773, IR=2836) |
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14 | |
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15 | c do j=1,npoints |
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16 | c if (idum(j).eq.0) then |
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17 | c write(6,*) 'idum=',idum |
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18 | c write(6,*) 'ZERO seed not allowed' |
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19 | c stop |
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20 | c endif |
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21 | c enddo |
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22 | |
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23 | do j=1,npoints |
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24 | k(j)=idum(j)/IQ |
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25 | idum(j)=IA*(idum(j)-k(j)*IQ)-IR*k(j) |
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26 | if (idum(j).lt.0) idum(j)=idum(j)+IM |
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27 | ran0(j)=AM*idum(j) |
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28 | enddo |
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29 | |
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30 | end |
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31 | |
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