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Fourier transform in NGSolve

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3 years 3 weeks ago #3639 by paul.stocker
Fourier transform in NGSolve was created by paul.stocker
Hello everyone!

I was wondering if there was any best way to get the FFT from a GridFunction in NGSolve?

Best,
Paul
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3 years 3 weeks ago #3640 by joachim
Replied by joachim on topic Fourier transform in NGSolve
Hm ...

what do you assume from you mesh and your space ?
with structured meshes and Nodal-P1 you can take your coefficient vector and fead it into Python - FFT

otherwise, you have to evaluate your GridFunction on a regular grid of points (using geometric search) first.

Joachim
The following user(s) said Thank You: paul.stocker
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3 years 3 weeks ago #3641 by joachim
Replied by joachim on topic Fourier transform in NGSolve
Hm ...

what do you assume from you mesh and your space ?
with structured meshes and Nodal-P1 you can take your coefficient vector and fead it into Python - FFT

otherwise, you have to evaluate your GridFunction on a regular grid of points (using geometric search) first.

Joachim
The following user(s) said Thank You: paul.stocker
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