conversion problem, layout

Olga Sysoeva olga at GRAPHICMIND.INFO
Fri May 5 11:20:44 CEST 2006

Dear Robert,

Yes, my problem appeared to be fixed in the last updated version of
Now I can topoplot the data, but it seems to work wrong to me. All my
electrodes appeared to be in the middle of the plotted head (shrinked
compared to the head size). What can it be?

Best Regards,

----- Original Message -----
From: "Robert Oostenveld" <r.oostenveld at FCDONDERS.RU.NL>
Sent: Thursday, May 04, 2006 7:58 PM
Subject: Re: [FIELDTRIP] conversion problem, layout

> Dear Olga,
> On 4 May 2006, at 16:53, Olga Sysoeva wrote:
>> This time I want to convert averaged ERP files, made in BESA. I  exported
>> them as multiplex files from BESA and  convert to  fieldtrip with
>> besa2fieldtrip function. It  seems to work well. I  also read my .sfp
>> file (data.elec = read_fcdc_elec ('GNS64sag1.sfp');). It goes without
>> problems but when I wanted to  plot the scalp potentials (topoplotER
>> (cfg,
>> data) the error appeared "reference to non-existent field 'chanX',  line
>> 302
>> topoplot  and 268 topoplotER.
> I know that this problem seems to happen since the topoplot and  multiplot
> functions were extended with interactive options. My  colleague Ingrid
> (see CC) has been working on the problem, and I  recall that she already
> fixed the problem (and some other problems).  It might be that the ftp
> version of fieldtrip does not yet contain  the updated function. I suggest
> that you download the latest daily  version of fieldtrip from the ftp, and
> try once more. If the problem  then still persists, please send a matlab
> file containing the erf and  electrodes (and possibly also the two
> original besa files) to Ingrid,  so that she can try to reproduce the bug.
>> I had the same problem with converting my data from eeglab, too.
>> Probably, it is safer to create my our layout file, but I need to  know
>> the structure of it.
> The layout file format is explained in the FAQ at
> fcdonders/fieldtrip/doku.php?
> id=fieldtrip:documentation:frequently_asked_questions#what_is_the_format
> _of_the_layout_file_which_is_used_for_plotting.
> best regards,
> Robert

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