[FieldTrip] ft_preprocessing ignores channel selection

[Steph Bickel]

Hello,

sorry for re-posting this, but I was wondering if someone had an idea what is going wrong here? Is there something wrong with my configuration?

Thank you!

Stephan




> On Sep 26, 2015, at 11:54 PM, Steph Bickel <bick35 at gmail.com> wrote:
> 
> Hello fieldtrip experts,
> 
> a script that used to work gives me problems now. 
> 
> When I specify subsets of channels to import it will correctly only import the selected label but in the trial field it will have all channels imported. 
> 
> 
> cfg=[];
> cfg.dataset =  edf_file ;
> cfg.continuous = ‘yes’;
> cfg.demean = ‘yes' ;
> cfg.channel = ‘Event' ;
> raw = ft_preprocessing(cfg);
> 
> raw = 
> 
>            hdr: [1x1 struct]
>          label: {'Event'}
>           time: {[1x152082 double]}
>          trial: {[129x152082 double]}
>        fsample: 499.7071
>     sampleinfo: [1 152082]
>            cfg: [1x1 struct]
> 
> 
> It seems that read_edf.m is being called and at line 351 the chanindx is being overwritten by EDF.chansel (which is being read out of the edf header directly). Do I see this correctly or am I setting wrong parameters?
> 
> 
>   if isfield(EDF, 'chansel')
>       chanindx = EDF.chansel;
>       chanSel = 1;
>   else
>       chanindx = [1:EDF.NS]; 
>       chanSel = 0;
>   end;
> 
> 
> 
> Thank you!
> 
> Stephan 
> 
> (I’m using the current github field trip version on a mac) 

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