Fourier transform of a current data file

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Hi everyone I have to get fourier transform of a current data file. It's about calculating the high harmonic generation. How can I do it? Thanks for your guide
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Walter Roberson
Walter Roberson on 16 Aug 2020
Read in the file and then fft() or fft2() or fftn() the array?
See the first example in the fft() documentation for guidance on creating the axes values.

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