FFT in MatLab and Origin Pro comparison. Plots are the same but frequency data is a little bit different. Why?

Hi everybody! I did a fft code to MatLab and then I tried to compare with OriginPro, essentially I have the same plots in both softwares but I have a problem, when I observe the points I plot are a little bit different, so I can't understand what is happening :S

I show you only the firsts values of frequency because there are approximately 67000 values

Thanks in advance!

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Answer 1

[dpb]

First of all, you'll have to use the same number of points for both spectra, then the difference should simply be one of setting the actual limits of the plot to coincide; quite likely each product has a slightly different algorithm for setting default plotting limits.

[Jose Peñaloza]

Thank you! I will try to fix it :/

[dpb]

I've no klew regarding the other program, in Matlab you set the plotting limits with xlim