[Mne_analysis] [MNE analysis] psd_welch

Eric Larson larson.eric.d at gmail.com
Fri Feb 15 10:04:57 EST 2019
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Is it perhaps just a problem of units? The plotters typically scale things
to show data in uV or fT, whereas data on disk (and thus returned by
`psd_welch` et al.) are stored in the objects in SI units (V, T).


On Fri, Feb 15, 2019 at 9:39 AM Lidia Miguel Telega <
lidia.migueltelega at gmail.com> wrote:

>         External Email - Use Caution
> Dear MNE team,
> I have some doubts about the units psd_welch returns for the PSD as my
> output values have a magnitude of 10**-11/-12 and I'd like to get the same
> values in dB  that are displayed in the plot when using:
> rawB0939_copy.plot_psd(fmin=0.5,fmax=30)
> Maximum values I get in the plot in the range of  0-4 Hz are around 15 to
> 25 dB, using the different dB (True/False) and estimation
> (auto,power,amplitude) options.
> I use this line of code to compute psd values:
> psd_delta,freqs_delta=time_frequency.psd_welch(rawB0939_copy,fmin=0.5,fmax=4)
> Thank you for your help,
> Lidia
> --
> *Lidia Miguel Telega*
> *M. Sc. Neuroscience*
> *Albert-Ludwigs-University of Freiburg, Germany*
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