Spectrogram

I have a simple sine signal (data) with a frequency of 6Hz, lasting 30 seconds. When I perform a spectrogram of data, I should get a time-frequency plot where 6Hz is the solid line, instead I get 0.1Hz, what am I doing wrong?

Do you have a webinar that shows how to perform spectrograms, STFT, etc?

[Liangjun Zhang]

Hi Mike,

Have you solved this problem? I have the same problem, can you give me some suggestions?

Thank you!

Andrew

[Wayne King]

Hi Liangiun, Mike has accepted this answer so it appears the issue is solved for him. If you are having trouble with spectrogram.m, please start a new post and make sure to include whatever code you have.

Answer 1

[Vieniava]

Frequency sampling ( Fs ) - this is all about. You should specify correct Fs - try spectrogram in this usage:

S=spectrogram(x,window,noverlap,nfft,fs)