我必须分析一些EEG数据,我正在尝试自动化预处理程序。
我有40个参与者。每个参与者有4个不同的文件,有4个条件。
所以文件保存为
1-1
1-2
1-3
1-4
2-1
2-2
2-3
2-4
...
高达40-4
这些文件来自BioSemi(.bdf)
我已经能够自动化预处理过程,但每次我必须选择不同的文件时,运行脚本并保存。
我想运行一个for循环来完成所有这一切(取1-1,运行预处理,保存,取1-2 ......等)。
我正在粘贴到目前为止我所拥有的东西。
我一直在努力写一个for循环,但它只是不起作用。
我真的很感激任何帮助。
这是当前的预处理脚本:
subject = '1-1.bdf'
%Open EEGLAB and inizialize several EEGLAB variables (listed in the output
%function
[ALLEEG EEG CURRENTSET ALLCOM] = eeglab;
%Load a file
%EEG=pop_loadset; % pop up window to input arguments
EEG = pop_biosig(subject) %Reads in the dataset frin a BIOSEMI file
% Stores the dataset into EEGLAB
[ALLEEG EEG CURRENTSET ] = eeg_store(ALLEEG, EEG);
%Change sampling rate to 512
EEG = eeg_checkset( EEG );
EEG = pop_resample( EEG, 512);
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, CURRENTSET); %save it as a new dataset
% Edit Channel Location
EEG = eeg_checkset( EEG );
EEG=pop_chanedit(EEG, 'lookup','D:\\Matlab\\eeglab_current\\eeglab13_5_4b\\plugins\\dipfit2.3\\standard_BESA\\standard-10-5-cap385.elp');
% Store the dataset into EEGLAB
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, 2,'overwrite','on','gui','off');
% Add some comments
EEG.comments = pop_comments(EEG.comments,'','Sampling rate was changed to 512.',1);
% You can see the comments stored with the dataset either by typing >> EEG.comments or selecting the menu option Edit->About this dataset.
%Select Data. Remove EXG5:EXG8
EEG = eeg_checkset( EEG );
EEG = pop_select( EEG,'nochannel',{'EXG5' 'EXG6' 'EXG7' 'EXG8'});
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, 2,'overwrite','on','gui','off');
%HighPassFilter 0.5
EEG = eeg_checkset( EEG );
EEG = pop_eegfilt( EEG, 0.5, 0, [], [0], 0, 0, 'fir1', 0);
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, 2,'overwrite','on','gui','off');
%LowPassFilter 50
EEG = eeg_checkset( EEG );
EEG = pop_eegfilt( EEG, 0, 50, [], [0], 0, 0, 'fir1', 0);
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, 2,'overwrite','on','gui','off');
%ReReference to 35 36 (EXG3. EXG4)
EEG = eeg_checkset( EEG );
EEG = pop_reref( EEG, [35 36] );
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, 2,'overwrite','on','gui','off');
% Reject Continuous By Eye
EEG = eeg_checkset( EEG );
pop_eegplot( EEG, 1, 0, 1);
eeglab redraw % Update the EEGLAB window to view changes
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Automatic Channel Rejection
EEG = eeg_checkset( EEG );
EEG = pop_rejchan(EEG, 'elec',[1:34] ,'threshold',5,'norm','on','measure','prob');
[ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, 2,'overwrite','on','gui','off');
eeglab redraw % Update the EEGLAB window to view changes
答案 0 :(得分:1)
以下是如何在循环中访问文件名,以便您可以运行MATLAB脚本。最简单的方法是将.bdf文件放在一个文件夹中。然后编写一个包含所需功能的函数,如下所示:
function run_script_with_loop(pathname)
file_struct_list = dir([pathname filesep() '*.bdf']); %% get list of .bdf files in the pathname specified
filename_list = {file_struct_list.name}; %% extract the filenames into a cellarray
for subject = filename_list %% this iterates over the elements of the cell array, one-by-one, setting the `filename` variable like a loop variable
[ALLEEG EEG CURRENTSET ALLCOM] = eeglab;
full_pathname = [pathname filesep() subject{1}];
EEG = pop_biosig(full_pathname); %% perform your processing
...
end
一些评论:
我试图通过使用filesep()
来与平台无关
这应该适用于linux / mac / windows。如果您正在运行代码
在与数据文件相同的目录中,您当然可以简化
此
取消引用{}
时,请务必使用花括号subject
。如果您使用带有subject(1)
的标准matlab数组引用,那么您将获得一个包含文件名字符串的单元格数组,而不仅仅是纯文件名字符串
MATLAB中的dir()
命令就像Windows中的dir
或Linux中的ls
一样,您可以使用通配符来获取文件的自定义列表,例如{{ 1}}仅获取主题1的数据文件列表