[Eeglablist] EEG data rank

Cedric Cannard ccannard at protonmail.com
Wed Mar 3 18:31:22 PST 2021


Never mind, it works with rank(double(EEG.data))

Sorry, I thought EEGLAB' data had double precision by default.


‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, March 3, 2021 6:27 PM, Cedric Cannard <ccannard at protonmail.com> wrote:

> Hi everyone,
> I was trying to assess data rank after importing some Biosemi and Neuroscan data, trying different importing methods, as well as re-referencing methods (average and REST) to see their impacts on rank, but get weird numbers (e.g. rank 1, 9, 21 with 64 channels data). I have been using rank(EEG.data) in Matlab 2020b.
> I have tried importing data with pop_biosig and pop_readbdf, with Cz as reference or no reference (same results), and pop_loadcnt for neuroscan .cnt data.
> I am also seeing rank changes after downsampling, filtering, interpolating channels, etc.
> Is this not the right way to assess rank?
> Cedric

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