| [414] | 1 | c *********************************************************************** |
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| 2 | |
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| 3 | subroutine interdp_limits ( yy,zz,m, i1,i2, y,z,n, j1,j2, opt) |
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| 4 | |
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| 5 | c Interpolation soubroutine. |
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| 6 | c Returns values between indexes i1 & i2, donde 1 =< i1 =< i2 =< m |
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| 7 | c Solo usan los indices de los inputs entre j1,j2, 1 =< j1 =< j2 =< n |
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| 8 | c Input values: y(n) , z(n) (solo se usan los valores entre j1,j2) |
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| 9 | c zz(m) (solo se necesita entre i1,i2) |
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| 10 | c Output values: yy(m) (solo se calculan entre i1,i2) |
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| 11 | c Options: opt=1 -> lineal ,, opt=2 -> logarithmic |
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| 12 | c Difference with interdp: |
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| 13 | c here interpolation proceeds between indexes i1,i2 only |
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| 14 | c if i1=1 & i2=m, both subroutines are exactly the same |
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| 15 | c thus previous calls to interdp or interdp2 could be easily replaced |
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| 16 | |
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| 17 | c JAN 98 MALV Version for mz1d |
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| 18 | c jul 2011 malv+fgg Adapted to LMD-MGCM |
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| 19 | c *********************************************************************** |
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| 20 | |
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| 21 | implicit none |
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| 22 | |
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| 23 | ! Arguments |
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| 24 | integer n,m ! I. Dimensions |
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| 25 | integer i1, i2, j1, j2, opt ! I |
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| 26 | real*8 zz(m),yy(m) ! O |
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| 27 | real*8 z(n),y(n) ! I |
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| 28 | |
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| 29 | ! Local variables |
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| 30 | integer i,j |
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| 31 | real*8 zmin,zzmin,zmax,zzmax |
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| 32 | |
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| 33 | c ******************************* |
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| 34 | |
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| 35 | ! type *, ' d interpolating ' |
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| 36 | call mindp_limits (z,n,zmin, j1,j2) |
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| 37 | call mindp_limits (zz,m,zzmin, i1,i2) |
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| 38 | call maxdp_limits (z,n,zmax, j1,j2) |
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| 39 | call maxdp_limits (zz,m,zzmax, i1,i2) |
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| 40 | |
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| 41 | if(zzmin.lt.zmin)then |
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| 42 | write (*,*) 'from d interp: new variable out of limits' |
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| 43 | write (*,*) zzmin,'must be .ge. ',zmin |
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| 44 | stop |
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| 45 | ! elseif(zzmax.gt.zmax)then |
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| 46 | ! type *,'from interp: new variable out of limits' |
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| 47 | ! type *,zzmax, 'must be .le. ',zmax |
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| 48 | ! stop |
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| 49 | end if |
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| 50 | |
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| 51 | do 1,i=i1,i2 |
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| 52 | |
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| 53 | do 2,j=j1,j2-1 |
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| 54 | if(zz(i).ge.z(j).and.zz(i).lt.z(j+1)) goto 3 |
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| 55 | 2 continue |
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| 56 | c in this case (zz(i2).eq.z(j2)) and j leaves the loop with j=j2-1+1=j2 |
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| 57 | if(opt.eq.1)then |
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| 58 | yy(i)=y(j2-1)+(y(j2)-y(j2-1))*(zz(i)-z(j2-1))/(z(j2)-z(j2-1)) |
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| 59 | elseif(opt.eq.2)then |
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| 60 | if(y(j2).eq.0.0d0.or.y(j2-1).eq.0.0d0)then |
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| 61 | yy(i)=0.0d0 |
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| 62 | else |
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| 63 | yy(i)=exp(log(y(j2-1))+log(y(j2)/y(j2-1))* |
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| 64 | @ (zz(i)-z(j2-1))/(z(j2)-z(j2-1))) |
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| 65 | end if |
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| 66 | else |
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| 67 | write (*,*) ' d interp : opt must be 1 or 2, opt= ',opt |
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| 68 | end if |
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| 69 | goto 1 |
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| 70 | 3 continue |
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| 71 | if(opt.eq.1)then |
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| 72 | yy(i)=y(j)+(y(j+1)-y(j))*(zz(i)-z(j))/(z(j+1)-z(j)) |
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| 73 | ! type *, ' ' |
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| 74 | ! type *, ' z(j),z(j+1) =', z(j),z(j+1) |
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| 75 | ! type *, ' t(j),t(j+1) =', y(j),y(j+1) |
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| 76 | ! type *, ' zz, tt = ', zz(i), yy(i) |
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| 77 | elseif(opt.eq.2)then |
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| 78 | if(y(j+1).eq.0.0d0.or.y(j).eq.0.0d0)then |
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| 79 | yy(i)=0.0d0 |
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| 80 | else |
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| 81 | yy(i)=exp(log(y(j))+log(y(j+1)/y(j))* |
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| 82 | @ (zz(i)-z(j))/(z(j+1)-z(j))) |
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| 83 | end if |
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| 84 | else |
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| 85 | write (*,*) ' interp : opt must be 1 or 2, opt= ',opt |
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| 86 | end if |
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| 87 | 1 continue |
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| 88 | return |
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| 89 | end |
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| 90 | |
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| 91 | |
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| 92 | |
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| 93 | |
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| 94 | |
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| 95 | |
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| 96 | |
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