[FieldTrip] problems using fieldtrip for source reconstruction EEG

[Irene Varela Leniz]

Good morning Julian,

Can you help me with plotting some resting state EEG signals? I am new in
Fieldtrip and I dont find clear information about this topic and I dont
really know how to do plottings in Fieldtrip. I feel like the fieldtrip
documentation is a little bit weak....

Thank you in advance,
Best regards,

Irene Varela

El vie., 4 ene. 2019 a las 14:08, Julian Keil (<julian.keil at gmail.com>)
escribió:

> Hi Irene,
>
> what is the reason to use the extra checkdata step?
> The function checks if the input data has the correct „datatype“ field.
> Since you probably don’t have that field, the function will throw an error.
>
> Also, I’d recommend using the eeglab2fieldtrip-function to get from EEGlab
> .set to a fieldtrip-like structure.
>
> Best,
>
> Julian
>
>
> Am 04.01.2019 um 12:47 schrieb Irene Varela Leniz <
> irene.varela at alumni.mondragon.edu>:
>
> Hi,
>
> I am a researcher in Mondragon University working on source reconstruction
> of EEG data. I am new at fieldtrip and I feel a little bit lost about this
> software. I have some errors in a code I have developed but I do not manage
> to solve them. Could you please help me?
>
> I want to plot EEG data of a channel called 'A1' which is the first row in
> a 2D matrix variable called data, which is inside EEG structure. The code I
> have developed is below and I get the following error:
>
> *Error using ft_checkdata (line 525)*
> *This function requires 'timelock' or 'freq' data as input, see
> ft_datatype_timelock or ft_datatype_freq.*
>
> The code is the following:
> *clc; clear all; close all;*
> *clear variables*
> *restoredefaultpath;  % set a clean path*
> *main='E:\';*
> *cd='E:\fieldtrip-20181217'; % change this*
> *addpath(cd);*
>
> *ft_defaults;*
> *filename = "E:\PBLdata\O200_RS1_final.set"; %cambiar aqui y poner vuestro
> directorio*
> *load(filename, '-mat'); %Create EEG struct*
> *location = EEG.chanlocs;*
> *data = EEG.data; *
>
> *cfg = [];*
> *cfg.xlim = [-0.2 1.0];*
> *cfg.ylim = [-1e-13 3e-13];*
> *cfg.channel = 'A1';*
> *datos = data(1,:);*
> *Ndata = numel(datos);*
> *for i=1:Ndata*
> *  % check if the input data is valid for this function*
> *  datos(i) = ft_checkdata(datos(i), 'datatype', {'timelock', 'freq'});*
> *end*
>
> *figure; ft_singleplotER(cfg,datos);*
>
> Thank you in advance,
>
> Irene
>
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