Delete unwanted volumes from Brainvoyager FMR files.

FMR_delete_volumes.m

% Delete unwanted volumes from timeseries data (Brainvoyager, FMR format).
clear all;

% Enter FMR file path and volume indices to be erased
fmr_path = '/path/to/your/file.fmr';
vol_erase = [50:60, 100:103];

% Load FMR (headers) and STC (data)
fmr = xff(fmr_path);
data = fmr.Slice.STCData(:, :, :, :);

% Remove unwanted volumes
data(:, :, vol_erase, :) = [];
new_NrOfVolumes = size(data, 3);

% Update fmr
fmr.Slice.STCData = data;
fmr.NrOfVolumes = new_NrOfVolumes;

% Save
fmr.SaveAs([fmr_path(1:end-4), '_cropped.fmr']);
disp('Done.')