[Eeglablist] The orientation of the data and the scale factor of a BDF file

Andreas Widmann widmann at uni-leipzig.de
Mon Aug 7 05:23:54 PDT 2017


Hi Ayala,

the pop_bdfread function from here:
https://github.com/widmann/erptools/blob/master/pop_bdfread.m
returns a BDF header structure as third output argument if requested.

Note that EEGLAB’s pop_readbdf function shouldn’t be used anyway if you ever paused recording or CMS was out of range. See here for more details:
https://sccn.ucsd.edu/bugzilla/show_bug.cgi?id=1373

Hope this helps! Best,
Andreas

> Am 31.07.2017 um 17:42 schrieb Ayala Allon <ayalaallon at gmail.com>:
> 
> Hi everyone,
> 
> I would greatly appreciate your help on the following issues. 
> 
> I use BioSemi system and Active View version 7.05 to record the data, and I need to able to extract the following information from my BDFs files:
> 1. The orientation of the data (e.g., Multiplexed).
> 2. The scale factor.
> 
> As I understand, this information is stored in the header of the BDF file (https://www.biosemi.com/faq/file_format.htm). However, I don't know a function in MATLAB with which I could also read the header of the BDF file.
> 
> Currently I use pop_readbdf() to import the BDF file into MATLAB, and I don't think the EEGLAB data structure (the output) provides the above information. 
> 
> Does anyone know a way with which I could extract this information?
> 
> Thank you in advance,
> 
> Ayala
> 
> -- 
> Ayala Allon, PhD Candidate 
> The Visual Working Memory Lab
> School of Psychological Sciences
> Tel-Aviv University
> ayalalallon at gmail.com
> Check out my blog post on R-bloggers
> http://people.socsci.tau.ac.il/mu/royluria/
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