Dimension and Sampling Rate of Pulse, SpO2, etc.

💬 Support & Discussions
1

Hello,

I have used pyedflib and it shows that ‘SpO2’ has a dimension of ‘%’ and sample rate of 16Hz.

How can I see it (dimension and sampling rate) in MNE? By using raw.info, I get the sampling frequency of the EEG channels, which is equal to 256 Hz. How can I see the sampling frequency of ‘SpO2’ ?

2

I don’t think MNE supports different sampling rates for different channels. Not sure how the import handles this in your specific case…

3

yes MNE cannot handle this and will upsample the SpO2 to match the EEG sfreq

Alex

4

Thank you !
Does upsampling mean that the original signal is padded with 0s ?

5

I would assume it’s quite the opposite – each data point in the original signal gets repeated a number of times to fill in the “gaps”. Or maybe there’s even some sort of linear interpolation going on? No idea, I don’t know the MNE internals of upsampling.