Export PSD to Matlab with Frequency and Power

1

I tried exporting the PSD struct to matlab. But, I couldn't find the power values in any of the elements of the power spectrum structure](https://neuroimage.usc.edu/brainstorm/Tutorials/ArtifactsFilter).

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I want to access the power (ie. Y axis valyes of following graph) of each frequency.
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Can someone help me here out?

2

Hi @Rasmita,

As indicated in the docs

  • PSD values are stored in the TF field of the exported structure, it has the shape [Nchannels, NTime, Nfreqs]. As it's PSD Ntime is equal to 1.
  • As the field Measure indicates power, the PSD values are u^2/Hz
  • The names of the channels are stored in the field RowNames
  • The frequency axis in the field Freqs

With all this, the following lines replicate the figure:

% psd_data is the exported structure
figure()
plot(psd_data.Freqs, 10*log10(squeeze(psd_data.TF))' )
legend(psd_data.RowNames)
3

Thank you Raymundo!