function s = getSubjectIDString(model) % TODO rename to getSubjectIDStringCellArray
    tmp_sidx =  get(model.subjectSelector,'Value');
    tmp_cellList = getSubjectCellList(model.subjectMap);

    if size(tmp_sidx,2) >= 1
        s = tmp_cellList(tmp_sidx);
    else
        error('spmtoolbox:SVMCrossVal:getSubjectID:NoSelection','no subject selected');
    end

end