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Problem with Frequency distribution plot

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AkB
AkB 2023-4-12
编辑： Torsten 2023-4-13
I have a scatter plot in (x, z). I need to plot a frequency distribution of z-values as a function of x. Please suggest.
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Image Analyst
Image Analyst 2023-4-13
This is a poorly worded question. Perhaps frequency distribution means histogram. I was thinking it was like a signal and he wanted the frequency spectrum of the signal. But it looks like @AkB is ignoring our comments, so I'm not going to do anything more until we hear back from @AkB with a clearer explanation of what the context/situation is.
Torsten
Torsten 2023-4-13
编辑：Torsten 2023-4-13
@Image Analyst
I think he/she is unsure about it himself/herself.

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回答（1 个）

Image Analyst
Image Analyst 2023-4-12
If x is not uniformly spaced then use interp1 or spline to get x and z uniformly spaced. Then call fft(z).
ft = fft(z);
plot(abs(ft), 'b-');

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