[FieldTrip] signal acquisition with Biosemi

Robert Oostenveld r.oostenveld at donders.ru.nl
Thu Feb 9 15:41:23 CET 2012


Dear Sophie and Hamza

the acquire script that is present in the fieldtrip/realtime/acquisition/biosemi directory is only an example script that was written for initial testing. It acquires data in MATLAB, processes it and writes to a file. 

I believe that the normal way of acquiring data for biosemi is to run the biosemi2ft.exe application, i.e. not in MATLAB. Philip (CC) should be able to tell what the the normal use is, they do this in their lab every day.

best
Robert



On 9 Feb 2012, at 5:16, Hamza Fawzi Altakroury (Student) wrote:

> Yes, I faced that problem before.
> 
> I searched for the function and found it in
> 
> https://sccn.ucsd.edu/svn/software/tags/EEGLAB7_0_1_5beta/external/fieldtrip-20090727/external/biosig/gdfdatatype.m
> 
> But also I did face another problem after that as I remember. Could you check and tell us the result?
> 
> Best,
> 
> Hamza
> 
> On Wed, Feb 8, 2012 at 7:03 PM, Sophie ADAMA <adama.sophie at gmail.com> wrote:
> Hi,
> 
>  
> 
> I am trying to use the acquisition program acquire.m with Biosemi but I get the following error.
> 
>  
> 
>  
> 
> ??? Undefined function or method 'gdfdatatype' for input arguments of type 'char'.
> 
>  
> 
> Error in ==> acquire at 51
> 
> [datatyp,limits,datatypes,HDR.Bits,HDR.GDFTYP]=gdfdatatype('int32');
> 
>  
> 
> There is no gdfdatatype function in the toolbox.
> 
> 
> What should I do? Can somebody help me, please ?
> 
>  
> 
> Sophie
> 
> 
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> 
> 
> 
> -- 
> Hamza Fawzi Altakroury
> Graduate student - MA
> Faculty of Engineering and Natural Sciences
> Sabanc─▒ University
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