I think I can use convert_pde_data_3d so no problem now.

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Hi everyone. I am a beginner of Freefem. Now I am computing on a cubic domain and want to plot the solution in Matlab with “ffmatlib”. I am using periodic boundary condition and a periodic fespace.

I wish could interpolate the solution but cannot find a proper function to do this. I also tried to write a script on my own but failed, since I have difficulties understanding the fespace data “Vh” and solution data “u” from “ffsavedata” together with the mesh data.

May I ask if there is such an interpolation function in 3D? Otherwise where can I find information about “ffsavedata”?

Many thanks!