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Power spectral density (PSD)


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Hi guys,

I have a little problem with this. I have a few numbers and I need to do a power spectral density with these numbers, but when I do this I have got something different like what I want.  I don´t know what I am doing wrong. The picture is describing what I want to get. 

Could anybody help me? 

 

Thank you very much

PSD.vi

post-38707-0-85306900-1372521289_thumb.p

Edited by Majo
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It looks to me like the data is already processed. If you just plot the data directly (and change the graph scale to logarithmic) you will get:

 

 

 

psd1.png

 

If you want to smooth it, use the Interpolate 1D.vi and select spline (ntimes= 10).and you will get:

 

psd2.png

Edited by ShaunR
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