Convert the code to parallel compute.The error says line 1:unable to perform assignment because the index on the left is not compatible with the size on the right.If I remove line 8 ,9,the program runs well.Can't I use loop variable i in parfor?

parfor i=100:1438
   I=Im(:,:,i);
   I = AnisotropicDiffusion(0.01,0.002,I); 
   [Ex,Ey] = gradient(I);                              
   f = sqrt(Ex.*Ex+Ey.*Ey);                                            
   [u,v] = GVF(f, 0.08, 200);                                          
   mag = sqrt(u.*u+v.*v);
   **px(i) = u./(mag+1e-10); 
   py(i) = v./(mag+1e-10);**    
end

Answer 1

[Walter Roberson]

We do not know the size of the variables returned by the function GVF, but the way the code is written implies that u and v are vectors. If they are then normalized u would be a vector but you are trying to store it in a scalar location.

[Sheldon Zeng]

I see.A stupid error.I used to think it's a error about parfor.Thanks.