fft on an unit matrix
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Hello i wanted to try a fft on an unit matrix, but the result of this is very strange.
A has the size 3x3
DFT = fft(eye(size(A)));
The result is:
Whats wrong here ?
2 个评论
madhan ravi
2018-12-12
why do you think it’s strange?
Guillaume
2018-12-12
You are aware that fft treats the columns of a matrix independently? There is no such thing as the fft of a matrix.
I'm not sure what you expect from the DFT of a signal with only 3 samples. It's never going to have any meaning anyway. That's nowhere near enough samples to capture any frequency. So what is the point of your trial?
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2018-12-12
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