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tutorial:shared:preprocessing_fic [2018/10/22 00:42]
42.49.180.224 [Reading the FIC data]
tutorial:shared:preprocessing_fic [2017/08/17 11:21] (current)
127.0.0.1 external edit
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-(select convert(int,CHAR(65)))+==== Reading the FIC data ==== 
 + 
 +**[[reference:​ft_definetrial|Ft_definetrial]]** and **[[reference:​ft_preprocessing|ft_preprocessing]]** require the original MEG dataset, which is available from [[ftp://​ftp.fieldtriptoolbox.org/​pub/​fieldtrip/​tutorial/​Subject01.zip]]. 
 + 
 + 
 +<​code>​ 
 +% find the interesting segments of data 
 +cfg = [];                                           % empty configuration 
 +cfg.dataset ​                = '​Subject01.ds'; ​      % name of CTF dataset ​  
 +cfg.trialdef.eventtype ​     = '​backpanel trigger';​ 
 +cfg.trialdef.prestim ​       = 1; 
 +cfg.trialdef.poststim ​      = 2; 
 +cfg.trialdef.eventvalue ​    = 3;                    % event value of FIC 
 +cfg = ft_definetrial(cfg);             
 +   
 +% remove the trials that have artifacts from the trl 
 +cfg.trl([1536, 39, 42, 43, 49, 50, 81, 82, 84],:= []; 
 + 
 +% preprocess the data 
 +cfg.channel ​  = {'​MEG',​ '​-MLP31',​ '​-MLO12'​}; ​       % read all MEG channels except MLP31 and MLO12 
 +cfg.demean ​   = '​yes'; ​                             % do baseline correction with the complete trial 
 + 
 +dataFIC = ft_preprocessing(cfg)
 +</​code>​ 
 + 
 +These data have been cleaned from artifacts by removing several trials and two sensors; see the [[tutorial:​visual_artifact_rejection|visual artifact rejection tutorial]]. 
 + 
 +Subsequently you can save the data to disk.  
 + 
 +  save dataFIC dataFIC