The FFT plot does not shows up, it is empty
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I want to get FFT of a vibration signal that is rrecorded in csv file. Fortunately, the figure with the plot of the signal displays correct data. However, when I try to perform fft, the figure is empty. I do not know of it is because of my code, the signal (or csv), or the MATLAB settings. Could you please help me to solve the problem.
Here is the code:
data = readtable('scope_0.csv');
column2 = data.Var2;
fs = 40000;
l1 = length(column2);
fft_result = fft(column2, l1);
fft_abs = abs(fft_result);
t = 0:1/fs:2000/fs;
freq = 0 : (1/t(end)) : fs/2 - (1/t(end));
And the figures:
Star Strider 2023 年 6 月 10 日
data(isinf(data)) = NaN;
data = fillmissing(data, 'linear');
since there may be a NaN or Inf value in ‘data’ that is causing the problem.
It would help to have the ‘scope_0.csv’ file.