[FieldTrip] Splitting EEG

[Hamed Taheri]

Hello Fieldtrip users,
I have a continues EEG data ( 80 seconds) and I would like to analyze some part of it.For instance, I want to analyse seconds 20 to 25 ( 5 seconds).Would you please let me know how can I select my times of interest.I've written a simple code but I don't know how can I split the data. 
cfg    = [];
cfg.dataset = '........  .eeg';
data_org                = ft_preprocessing(cfg); %Original Data

% Step1:  Filtering Row Data
cfg                        = [];
cfg.bpfilter            = 'yes';
cfg.bpfreq             = [1 30];
data_Filtered        = ft_preprocessing(cfg,data_org); 
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