% we pass in two extra options
% - ppivoi (the VOI object we loaded)
% - ppicond a cell array with either names of conditions
%   or contrasts to interact the VOI timecourse with
glm = mdm.ComputeGLM(struct( ...
    'ppivoi',    xvoi, ...
    'ppicond',   {{'ECL + ECM + ECH + EDL + EDM + EDH > PCL + PCM + PCH + PDL + PDM + PDH'}}, ...
    'outfile',   'CatEmot_noparam_split_allSsfixed_dmPFC_PPI_E_vs_P.glm', ...
    'showsdms',  'image', ...
    'tfilter',   220, ...
    'tfilttype', 'fourier'));
    
% after computation, visualize
glm.Browse