Last change
on this file since 4068 was
2,
checked in by lmdz, 25 years ago
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Initial revision
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Property svn:eol-style set to
native
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Property svn:executable set to
*
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Property svn:keywords set to
Author Date Id Revision
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File size:
882 bytes
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1 | FUNCTION RAN1(IDUM) |
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2 | DIMENSION R(97) |
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3 | save r |
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4 | save iff,ix1,ix2,ix3 |
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5 | PARAMETER (M1=259200,IA1=7141,IC1=54773,RM1=3.8580247E-6) |
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6 | PARAMETER (M2=134456,IA2=8121,IC2=28411,RM2=7.4373773E-6) |
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7 | PARAMETER (M3=243000,IA3=4561,IC3=51349) |
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8 | DATA IFF /0/ |
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9 | IF (IDUM.LT.0.OR.IFF.EQ.0) THEN |
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10 | IFF=1 |
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11 | IX1=MOD(IC1-IDUM,M1) |
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12 | IX1=MOD(IA1*IX1+IC1,M1) |
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13 | IX2=MOD(IX1,M2) |
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14 | IX1=MOD(IA1*IX1+IC1,M1) |
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15 | IX3=MOD(IX1,M3) |
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16 | DO 11 J=1,97 |
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17 | IX1=MOD(IA1*IX1+IC1,M1) |
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18 | IX2=MOD(IA2*IX2+IC2,M2) |
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19 | R(J)=(FLOAT(IX1)+FLOAT(IX2)*RM2)*RM1 |
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20 | 11 CONTINUE |
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21 | IDUM=1 |
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22 | ENDIF |
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23 | IX1=MOD(IA1*IX1+IC1,M1) |
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24 | IX2=MOD(IA2*IX2+IC2,M2) |
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25 | IX3=MOD(IA3*IX3+IC3,M3) |
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26 | J=1+(97*IX3)/M3 |
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27 | IF(J.GT.97.OR.J.LT.1)PAUSE |
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28 | RAN1=R(J) |
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29 | R(J)=(FLOAT(IX1)+FLOAT(IX2)*RM2)*RM1 |
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30 | RETURN |
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31 | END |
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