[FieldTrip] EEG sensor position layout again

Johanna Zumer johanna.zumer at gmail.com
Thu Aug 15 13:33:57 CEST 2013


Hi Hweeling,

Since it says that it cannot find the Quikcap file, it sounds like it's not
on your path.    Run  ft_defaults on your Matlab command, then test if the
file is on your path:
>> ft_defaults
>> which QuikCap_NSL_128.mat

Assuming it finds the file on your path, then do you still get the browser
error?

Best,
Johanna


2013/8/15 Hwee Ling Lee <hweeling.lee at gmail.com>

> Hi,
>
> A bit more details about my setup.
>
> I'm using a Easycap MRI compatible 128 channels cap. I tried to search for
> a layout on the templates/layout, and I found one that might closest fit to
> my needs ('QuikCap_NSL_128').
> To view my components, I tried these series of commands:
>
> cfg = [];
> cfg.viewmode = 'component';
> cfg.continuous = 'yes';
> cfg.layout = ft_prepare_layout('QuikCap_NSL_128');
> ft_databrowser(cfg,ic_data);
>
> However, I was prompted with error messages:
> Warning: Struct field assignment overwrites a value with class "char". See
> MATLAB R14SP2 Release Notes, Assigning Nonstructure
> Variables As Structures Displays Warning, for details.
> > In utilities\private\ft_preamble_provenance at 49
>   In ft_preamble at 54
>   In ft_prepare_layout at 91
> Error using ft_prepare_layout (line 582)
> no layout detected, please specify cfg.layout
>
> Also when I tried the command,
>
> cfg = [];
> cfg.viewmode = 'component';
> cfg.continuous = 'yes';
> cfg.layout = 'QuikCap_NSL_128';
> ft_databrowser(cfg,ic_data);
>
> I get this error message:
> Warning: could not open QuikCap_NSL_128
> > In fileio\private\warning_once at 116
>   In fileio\private\filetype_check_header at 54
>   In ft_filetype at 328
>   In ft_prepare_layout at 253
>   In ft_databrowser at 226
> Warning: could not determine filetype of QuikCap_NSL_128
> > In fileio\private\warning_once at 116
>   In ft_filetype at 1115
>   In ft_prepare_layout at 253
>   In ft_databrowser at 226
> creating layout from electrode file QuikCap_NSL_128
> Error using ft_read_sens (line 68)
> file 'QuikCap_NSL_128' does not exist
>
> Error in ft_prepare_layout (line 275)
>   lay = sens2lay(ft_read_sens(cfg.layout), cfg.rotate, cfg.projection,
> cfg.style, cfg.overlap);
>
> Error in ft_databrowser (line 226)
>   cfg.layout = ft_prepare_layout(tmpcfg);
>
>
> Would anyone please help?
>
> Cheers,
> Hweeling
>
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