Recovering precise points on a graph
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Hello everyone,
I have several matlab graphs representing FFT of different signals, I try to recover only some frequencies and amplitudes
in order to arrange them in a table. with the uitable function.
I thought that by using the following line of code :
dat = {(fft_3(10000)), fft_3(30000) ,fft_3(90000), fft_3(200000), fft_3(400000)};
This would work. but the value of the amplitudes, has strictly nothing to do with those I can find in my graph
回答（1 个）
Sulaymon Eshkabilov
2021-6-1
You may try using graphical input with ginput(), e.g:
[x, y] = ginput(5); % Five freq. values, viz mag and f values will be picked up.
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2021-6-1
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