Conversion of space-time data to wavenumeber-time data
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I have a field data(space-time) that is dependent on space and time.I need to take fft or convert the space time data into wavenumber-time data. Can someone help me out.
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Bjorn Gustavsson
2021 年 6 月 21 日
編集済み: Bjorn Gustavsson
2021 年 6 月 21 日
Provided that your data is sampled on a regular spatial grid it should be as simple as to perform a (perhaps windowed) fft in the spatial dimension.
HTH
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Bjorn Gustavsson
2021 年 6 月 21 日
Yes. Read the help and documentation for fft - that function by default calculates the fft of the first non-singleton dimension (that is typically the column) of an array. You can explicitly tell the function what dimension to do the transform on/in/for. From the help to fft:
FFT(X,[],DIM) or FFT(X,N,DIM) applies the FFT operation across the
dimension DIM.
This should clarify your question.
HTH
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