Concatenating TF from trials

Discussions
1

Hello brainstorm developers,

I am using the following code to concatenate trials and create files for each channel:

% Process: Extract values: [all] 30-150Hz for Group A
FileA = bst_process('CallProcess', 'process_extract_values', GroupAFiles, [ ], ...
'timewindow', [ ], ...
'freqrange',  [30, 150], ...
'rows',       chan, ...
'isabs',      0, ...
'avgtime',    0, ...
'avgrow',     0, ...
'avgfreq',    0, ...
'matchrows',  1, ...
'dim',        1, ...  % Concatenate signals (dimension 1)
'Comment',    [GroupALabel ' HG: 30-150 Hz ' chan]);

The idea is to create files for each channel that contain all the trials in GroupA. I am also trying to preserve some metadata from the trials (specifically which session the trial was recorded on). I have that data elsewhere.

My question is: can I be confident that the order of the trials in FileA matches the order of the trials in GroupAFiles?

Thank you!

Best,

Dan

2

Hi Dan, that's correct the signals in the FileA follow the sequence of the files in GroupAFiles. Thus, each signal will have the name chan @ GroupAFiles(i).FileName

You can double-check this by:

  • Looking at value of the variable RowNames in the resulting TimeFreq,
    (right-click on the TimeFreq file, then File > View file contents), or

  • Plotting the time-series of the resulting TimeFreq file
    (right-click on the TimeFreq file, then Time series)

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