FINDING FREQUENCY FROM FFT PLOT
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my fft plot looks like above.how to find lower and higher frequencies for the above curve so that the bandwidth(upper-lower frequency) can also be calculated .i need to display lower and upper frequencies also.
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Hiro Yoshino
2020-1-8
Try this?:
% P fft power
% F fft frequency
idx = (P == PowerThreshold); % detect the indices of the power that match the threshold.
% Here are what you want I guess:
F_low = F(idx);
F_low = F_low(1);
F_high = F(idx);
F_high = F_high(end);
The point is extracting indices that correspond your threshold of the power.
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2020-1-8
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2021-8-20
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