Calculating the frequency of data
16 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Sam J
el 10 de Feb. de 2022
Comentada: Benjamin Thompson
el 10 de Feb. de 2022
I have a data (length-time) that looks like this. I am trying to calculate the frequncy of this data. Is there any way that I can calcukate this frequncy based on the peak to peak position?
0 comentarios
Respuesta aceptada
Benjamin Thompson
el 10 de Feb. de 2022
If you can do it manually, I like ginput. You use the mouse to select the points of interest and ginput returns the x and y values of those points from the plot.
>> t = 1:0.01:5;
>> x = sin(2*pi*4*t);
>> figure, plot(t, x);
>> [a, b] = ginput(2)
a =
1.8249
2.0645
b =
0.9913
0.9854
>> 1/(a(2)-a(1))
ans =
4.1731
4 comentarios
Benjamin Thompson
el 10 de Feb. de 2022
Use the fast fourier transform or fft function in MATLAB to map an input signal to the frequency spectrum. The signal processing toolbox also has some helpful things like findpeaks and pspectrum. You can also type "lookfor" followed by a key word to find functions that do things you want in MATLAB.
Más respuestas (0)
Ver también
Categorías
Más información sobre Parametric Spectral Estimation en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!