[Eeglablist] Using EEGLAB from within a function

[Arnaud Delorme]

Hi David,

I use EEGLAB functions in subfunctions all the time. However, when you want to call the main function, it is better to do it outside of your function in a script.

Arno

On Jan 27, 2014, at 12:53 AM, Andreas Widmann <widmann at uni-leipzig.de> wrote:

> Hi David,
> 
> try to find an introduction on variable scope in MATLAB, e.g. here
> http://www.ieee-uffc.org/ultrasonics/software/MATLAB/Lecture2/Lecture2_6.htm
> or here
> http://msenux.redwoods.edu/Math4Textbook/Programming/VariableScope.pdf
> 
> You cannot modify a workspace variable from within a function (without using global what is usually not recommended due to unexpected side effects). EEGLAB’s ALLEEG and EEG are workspace variables.
> 
> Berry’s example should guide you on the right track, however, there is either a pop_newset or eeg_store command missing before eeglab -redraw.
> [ALLEEG, EEG, CURRENTSET] = pop_newset(ALLEEG, EEG, CURRENTSET)
> or
> [ALLEEG, EEG, CURRENTSET] = eeg_store(ALLEEG, EEG, CURRENTSET);
> 
> Best,
> Andreas
> 
> Am 24.01.2014 um 23:03 schrieb berry van den berg <berryv.dberg at gmail.com>:
> 
>> Hi David, 
>> 
>> I would use something like: 
>> 
>> function dataOut = loadData(dataPath,filename)
>>  dataOut = pop_loadbv(dataPath,fileName);
>> end
>> 
>> then outside the function call
>> EEG = loadData(dataPath,filename)
>> eeglab -redraw
>> 
>> cheers,
>> 
>> 
>> 
>> On 24 January 2014 03:41, David Kaufman <david.kaufman at gmx.de> wrote:
>> Hello everyone,
>> 
>> I'm trying to use EEGLAB from within a function inside a script, e.g.
>> 
>> function test
>>    [ALLEEG EEG CURRENTSET ALLCOM] = eeglab;
>>    EEG = pop_loadbv(baseFolder, eegFile);     
>>    [ALLEEG EEG CURRENTSET] = eeg_store(ALLEEG, EEG, CURRENTSET)
>>    eeglab redraw       
>> end
>> 
>> Unfortunatly, as soon as the function returns my data set is not present in the GUI. If I put the contents of the above function in the root script the data set appears in the GUI.
>> 
>> Is it possible to call EEGLAB from a function and also see the data set or am I using EEGLAB wrong?
>> 
>> Regards,
>> David Kaufman
>> 
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>> 
>> 
>> -- 
>> Berry van den Berg
>> berryv.dberg at gmail.com
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> 
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