How to know the frequency from spectrogram image?
조회 수: 1 (최근 30일)
이전 댓글 표시
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/166663/image.png)
I would like to know the frequency from this spectrogram image. Can I know the frequency from the colorbar? Because I'm still confused of the colorbar unit. Is colorbar unit in Hz or dB? here's my code to get this image
p=dlmread('pv.txt'); m=mean(p); x=p-m; length(x); detik=24*60*60; fs=length(x)/detik; t=1/fs:1/fs:length(x)/fs; plot(t,x); Y=fft(x); plot(t,Y); f=fs*(0:length(Y)-1/length(Y)); spectrogram(x,128,120,256,fs,'yaxis');
I'm looking forward your help, thank you Frely
답변 (1개)
Christoph F.
2017년 8월 11일
The frequency is plottet on the vertical (y-) axis.
The color indicates amplitude, so it's probably in dB.
댓글 수: 0
참고 항목
카테고리
Help Center 및 File Exchange에서 Time-Frequency Analysis에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!