updated docu and print/warning info for regressors

                    if ctr < 1

                        % use only auxiliary tcca components that have correlation > ct

                        compindex=find(ADD_trn.ccac > ctr);

                        % throw a warning that overfitting might occur if

                        % all regressor's correlations are > ctr

                        if numel(compindex) == numel(ADD_trn.ccac)

                            msgbox('WARNING: All regressors have a canonical correlation larger than your threshold. To avoid overfitting, consider setting the number of regressors to a fixed number ctr = N.')

                        end

                    else

                        % use only the first ctr auxiliary tcca components (fixed number of

                        % regressors = ctr)

                %% save tCCAfilter matrix that was learned from resting state data.

                fprintf('hmrR_tCCA: run idx = %d. Generated and Saved tCCAfilter\n', runIdx)

                save(filterFilename, '-ascii', 'tCCAfilter');

                fprintf('Canonical correlation coefficients of all trained regressors:')

                ADD_trn.ccac(compindex)

            case 'apply'

                %% if the tCCAfilter variable exists, load it, apply the filtering and generate the tCCA regressors

                % Load the filter for the iBlk data block