Greetings all,
I rotate a vector field and than I tried to interpolate it to a new grid
using griddata.
CODE:
x_grid_unique = unique(x_grid)
y_grid_unique = unique(y_grid)
x_meshgrid, y_meshgrid = meshgrid(x_grid_unique, y_grid_unique)
x_rot_meshgrid = reshape(x_rot, [ len(x_meshgrid[:, 0]),
len(x_meshgrid[0, :])] )
y_rot_meshgrid = reshape(y_rot, [ len(x_meshgrid[:, 0]),
len(x_meshgrid[0, :])] )
u_rot_meshgrid = reshape(u_rot, [ len(x_meshgrid[:, 0]),
len(x_meshgrid[0, :])] )
v_rot_meshgrid = reshape(v_rot, [ len(x_meshgrid[:, 0]),
len(x_meshgrid[0, :])] )
u_interpolate = griddata(x_rot, y_rot, u_rot, x_rot_meshgrid,
y_rot_meshgrid)
v_interpolate = griddata(x_rot, y_rot, v_rot, x_rot_meshgrid,
y_rot_meshgrid)
I unfortunately griddata returns some nan (It seems that there are multiple
occurrences of the same [X,Y] pair in the data). In matlab you can use
griddata with additional options e.g. ru =
griddata(nx,ny,nu,rx,ry,'linear', {'QJ'}) to fix this, but this seems to be
not possible using the griddata function in matplotlib. Is there any other
way to avoid a return of nan?
For any help many thanks in advance
Andreas
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