[FieldTrip] data browser looking for missing cfg.headerformat

Steph Bickel bick35 at gmail.com
Sun Sep 27 08:15:13 CEST 2015

Hi Stephen,

thanks for your response, and for spelling my name right :)

The call to ft_read_header happened in the call to ft_databrowser, it wasn’t directly called by me. 

But, in the meanwhile, I get passed that point when calling the data browser with cfg.dataset instead of cfg.datafile. 

However, I have a new error (see below). The data I am trying to plot is just continuous data that I did not perform any artifact rejection on. 

would you have an idea what’s going on? 

Thank you!


cfg.continuous = ‘yes’;
cfg.demean = ‘yes’;
raw = ft_preprocessing(cfg,filename)

>> cfg=[];
cfg.viewmode = 'vertical';
cfg.continuous ='yes';
% cfg.dataset = edf ;
the input is raw data with 105 channels and 1 trials
detected   0 visual artifacts
Error using zeros
Size inputs must be integers.

Error in convert_event>artifact2artvec (line 179)
artvec = zeros(length(artifact), endsample);

Error in convert_event (line 103)
    obj = artifact2artvec(obj,endsample);

Error in ft_databrowser (line 511)
artdata.trial{1}       = convert_event(artifact, 'boolvec', 'endsample', datendsample); % every artifact is a "channel"

> On Sep 25, 2015, at 12:12 AM, Stephen Whitmarsh <stephen.whitmarsh at ki.se> wrote:
> Hi Stephan,
> Sorry for misspelling your name – I know how it feels J
> Stephen
> From: fieldtrip-bounces at science.ru.nl [mailto:fieldtrip-bounces at science.ru.nl] On Behalf Of Stephen Whitmarsh
> Sent: 25 September 2015 09:07
> To: FieldTrip discussion list <fieldtrip at science.ru.nl>
> Subject: Re: [FieldTrip] data browser looking for missing cfg.headerformat
> Hi Stefan,
> You haven’t defined the third argument you use in the call to ft_read_header, i.e. cfg.headerformat. You could change it to ‘edf’ I think, or just try to leave it out – pretty sure ft_read_header can figure out the dataformat.
> Cheers,
> Stephen
> From: fieldtrip-bounces at science.ru.nl <mailto:fieldtrip-bounces at science.ru.nl> [mailto:fieldtrip-bounces at science.ru.nl <mailto:fieldtrip-bounces at science.ru.nl>] On Behalf Of Steph Bickel
> Sent: 25 September 2015 06:20
> To: fieldtrip at science.ru.nl <mailto:fieldtrip at science.ru.nl>
> Subject: [FieldTrip] data browser looking for missing cfg.headerformat
> Hello fieldtrip experts, 
> I tried plotting an edf file. At line 325 the function ft_read_header seems to expect a field in the config structure that does not exist.
> Do you know if I am doing something wrong or if this is a bug?
> I am using the current field trip version downloaded from github.
> Thank you!
> Stephan
> cfg=[];
> cfg.viewmode = 'vertical';
> cfg.continuous ='yes';
> cfg.datafile = ‘/data/test.edf';
> ft_databrowser(cfg)
> Reference to non-existent field 'headerformat'.
> Error in ft_databrowser (line 325)
>   hdr = ft_read_header(cfg.headerfile, 'headerformat', cfg.headerformat);
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