PSD of a time function

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Daniel González
Daniel González 2019-4-27
评论： dpb 2019-4-28
Hello everyone,
I have the acceleration data collected from an accelerometer, and the acquisition time, the acceleration vs time graph is shown in the following image:
My question is, from this graph, how could I calculate in Matlab the PSD function in the frequency domain, from the temporal function shown above?
As an example of the practical problem, I used this code to generate the graph shown:
t = 0:.001:0.25;
x = sin(2*pi*50*t) + sin(2*pi*120*t);
plot(t,x)
Thanks in advance!
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Daniel González
Daniel González 2019-4-28
Thanks for your answer. And how could I obtain the PSD function?
dpb
dpb 2019-4-28
That's what the example shows, specifically...PSD via FFT

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