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1 | subroutine distrir(xmax,sigma,npoints) |
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2 | c for x-y in input10 ran=2 (LAL) |
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3 | c----------------------------------------------------------------------- |
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4 | c |
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5 | include 'param_sz.h' |
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6 | include 'constcom.h' |
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7 | c |
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8 | common/dist/distp(imaa),xr(imaa),yr(imaa) |
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9 | dimension n(imaa/5) |
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10 | c----------------------------------------------------------------------- |
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11 | c* |
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12 | fac=xmax/sigma |
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13 | xmaxsq=xmax**2 |
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14 | sigsq=sigma**2 |
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15 | const1=2*npoints/xmaxsq |
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16 | const2=npoints/(sigsq*(1.-exp(-xmaxsq/(2*sigsq)))) |
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17 | nbin=int(min(npoints/5,100)) |
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18 | pas=xmax/nbin |
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19 | ntot=0 |
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20 | |
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21 | c------- correction Guy Le Meur 24-09-2012 |
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22 | do 10 i=1,nbin |
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23 | n(i)=0 |
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24 | 10 continue |
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25 | |
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26 | do 20 i=1,nbin |
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27 | if(fac.lt.0.5) then |
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28 | c distribution uniforme |
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29 | n(i)=int(const1*(i-0.5)*pas*pas+0.5) |
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30 | ntot=ntot+n(i) |
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31 | if(ntot.gt.npoints) then |
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32 | n(i)=n(i)-ntot+npoints |
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33 | ntot=npoints |
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34 | go to 21 |
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35 | endif |
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36 | else |
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37 | c distribution gaussienne |
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38 | n(i)=int(const2*exp(-((i-0.5)*pas)**2/(2*sigsq)) |
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39 | 1 *(i-0.5)*pas*pas+0.5) |
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40 | |
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41 | ntot=ntot+n(i) |
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42 | if(ntot.gt.npoints) then |
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43 | n(i)=n(i)-ntot+npoints |
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44 | ntot=npoints |
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45 | go to 21 |
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46 | endif |
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47 | endif |
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48 | 20 continue |
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49 | c------- |
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50 | if(ntot.lt.npoints)then |
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51 | nextra=npoints-ntot |
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52 | do 25 l=1,nextra |
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53 | n(l)=n(l)+1 |
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54 | 25 continue |
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55 | endif |
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56 | 21 continue |
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57 | k=0 |
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58 | do 30 i=1,nbin |
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59 | if(n(i).eq.0) go to 30 |
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60 | theta=twopi/n(i) |
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61 | theta0=i*twopi/nbin |
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62 | do 35,j=k+1,k+n(i) |
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63 | xr(j)=(i-0.5)*pas*cos((j-1)*theta+theta0) |
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64 | yr(j)=(i-0.5)*pas*sin((j-1)*theta+theta0) |
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65 | 35 continue |
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66 | k=k+n(i) |
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67 | 30 continue |
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68 | return |
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69 | end |
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70 | c++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++* |
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