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How to do local FFT on huge 3D vector data cell mesh and visualize it spatially?

Simulation type: I'm running a simulation with the OOMMF micromagnetics package http://math.nist.gov/oommf/ where are magnet is represented by a mesh of 3 million cells, it gets excited by a magnetic … I use a rectangluar mesh here Question: The FFT can be done using something like MATHEMATICA or MATLAB for a single cell and (m_z/ number, time/number) data list .dat file, but a data binary 4 file …
James Last's user avatar