smooth curve smooth curve
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Hello, everyone.
How can I best smooth the curve (see attachment) (fitting)? Do you have an idea?
I thank you
2 Comments
Jan
on 17 Nov 2022
How do you define "good"? This must be specified before a "best" can be found. Do you want a low or high pass filtering? Or in other words: Are the low or the high frequencies the noise? "Fitting" is meaningful, if you know the function to fit from a physical model.
Answers (1)
Star Strider
on 17 Nov 2022
That appears to me to be a fft result after using the fftshift function on it. Each of the ‘peaks’ is a different frequency component.
Experiment with zero-padding the fft:
L = numel(s);
NFFT = 2^nextpow2(L);
FTs = fft(s, NFFT)/L;
Here, ‘s’ is the original time-domain signal.
The frequency vector should go from -Fn to + Fn, where ‘Fn’ is the Nyquist frequency (one-half of the sampling frequency).
.
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