Hi, This is Jeon
I usually use "Vibrationdata.m" by Tom Irvine to plot the waterfall of STFT.
I selected each value for STFT as following (window, plot frequency etc.).
I don't know why the peak is appeared at 1.2207Hz.
I guess, the reason is that I set that df(Hz) is 1.2207Hz. Therefore, the signal can be showed from 1.2207Hz. But, I set the plot frequency to 1Hz.
my opinion is correct?? In this case, what should I do?
Thank you.