I would like to create a database of resting EEG data from healthy neurotypical subjects. To do this, I have written a small program in Matlab for FFT analysis of EEG recordings in *.edf format. I also created a set of recordings in *. Fdt (FieldTrip Data Format). As far as I know, you can use EEGlab to convert the file to edf by first uploading the *.set file and then using Export--->Data to edf file. When you do this, the following error message appears in Matlab.
Warning SOPEN (EDF): A block exceeds 61440 bytes.
Warning SOPEN (EDF-Write): Relative scaling error is 5.880403e-07 (due to roundoff in PhysMax/Min).
Warning SWRITE: 410 NaNs added to complete data block.
As I understand it, these warnings indicate that there are problems with file size, data accuracy, and data padding. Should I ignore these warnings or are they more serious problems? What is the best way to convert ftd files to edf format using Matlab?
Have you tried the edfreader?
You can find it online or I can send it to you.
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