Currently, I am trying to sync up the LFP and unit spiking data from the EcephysProjectCache.
I am having trouble with the fact that for the LFP data, “NWB includes every 2nd sample
and every 4th channel” per the cheat sheet. What does this exactly mean?
For example, I tried to export all the LFP data from channels in VIS__ structures, and looked at the exported channel_ids list at the same time. I could see that the channel_ids, when ordered, increased by 2, except for one leap of 4.
I want to understand how exactly these channels work, because I want to compare them with the unit data in the same channels. My current understanding is that multiple channels of the unit data are all between one LFP contact and the next, but then I don’t understand why the channel_ids increase by 2 in the LFP data.
I guess the main question that would guide me best is, what exactly is the numbering scheme behind the channel_ids? Any suggestions on aligning unit data and spiking data by channel would help me greatly.