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adcroft |
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function [z] = cube2latlon(x,y,c,xi,yi) |
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% z=cube2latlon(x,y,c,xi,yi); |
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% |
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% Re-grids model output on expanded spherical cube to lat-lon grid. |
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% x,y are 2-D arrays of the cell-centered coordinates |
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% c is a 2-D or 3-D scalar field |
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% xi,yi are vectors of the new regular lat-lon grid to interpolate to. |
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% z is the interpolated data with dimensions of size(xi) by size(yi). |
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% |
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% e.g. |
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% >> x=rdmds('XC'); |
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% >> y=rdmds('YC'); |
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% >> t=rdmds('Ttave.0000513360'); |
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% >> xi=-179:2:180;yi=-89:2:90; |
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% >> ti=cube2latlon(x,y,t,xi,yi); |
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% |
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% $Header: /u/gcmpack/models/MITgcmUV/utils/matlab/Attic/cube2latlon.m,v 1.1.2.1 2001/04/13 18:28:23 adcroft Exp $ |
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[nx ny nz]=size(c); |
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for k=1:nz; |
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X=x; |
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Y=y; |
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C=c(:,:,k); |
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i=3*ny+(1:ny);j=floor(ny/2); |
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X(end+1,:)=X(i,j)'-360; Y(end+1,:)=Y(i,j)'; C(end+1,:)=C(i,j)'; |
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i=3*ny+(1:ny);j=floor(ny/2)+1; |
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X(end+1,:)=X(i,j)'+360; Y(end+1,:)=Y(i,j)'; C(end+1,:)=C(i,j)'; |
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i=5*ny+round(ny/2);j=1:floor(ny/2); |
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X(end+1,j)=X(i,j)+360; |
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Y(end+1,j)=Y(i,j); |
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C(end+1,j)=C(i,j); |
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i=5*ny+round(ny/2)+1;j=1:floor(ny/2); |
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X(end,j+ny/2)=X(i,j)-360; |
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Y(end,j+ny/2)=Y(i,j); |
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C(end,j+ny/2)=C(i,j); |
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i=2*32+(ny/2+1:ny);j=floor(ny/2); |
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X(end+1,1:ny/2)=X(i,j)'-360; |
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Y(end+1,1:ny/2)=Y(i,j)'; |
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C(end+1,1:ny/2)=C(i,j)'; |
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i=2*32+(ny/2+1:ny);j=floor(ny/2)+1; |
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X(end,ny/2+1:ny)=X(i,j)'+360; |
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Y(end,ny/2+1:ny)=Y(i,j)'; |
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C(end,ny/2+1:ny)=C(i,j)'; |
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z(:,:,k)=griddata(Y,X,C,yi,xi'); |
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end % k |