Hi, Could You help me with problem mentioned in the topic? I copied translational data (3 column vectors) from modal analysis in Patran (from f06 file). Now I have problem in reproducing the results in Matlab. I am trying to draw normal modes in Matlab, but I haven't got much luck so far. I would appreciate if you could help me and/or give me some ideas concerning this problem. All best regards, Yan Edit: As far I accomplished something like that I created mesh in Matlab with the same xy dimensions as the analyzed object in Abaqus and copied amplitudes vector , then reshaped it to size compatible with mesh. But the results... don't look good Edit2: Another update. Link to data I used http://pastebin.com/mLCHKn6R [Broken] (second column - don't know what to do with rest). Code I used in Matlab: (s is data imported from aforementioned .txt file) z=s(:,2);zz=reshape(z,11,13); x= 0:10:120;y=0:10:100;[X,Y]=meshgrid(x,y); y1=(0:1:100);x1=(0:1:120); y1=y1'; zz2=interp2(X,Y,zz,x1,y1,'cubic'); [xx1,yy1]=meshgrid(x1,y1); surf(xx1,yy1,zz2) Result obtained after cubic interpolation: Although the plot looks way better than before, the shape is complety different. Could You help me find out what I am doing wrong?