Dawn@4: 
Dawn@4: timeShift = length(formants) / length(vuv);
Dawn@4: 
Dawn@4: for( idx = 1: length( formants ) )
Dawn@4:     frameIdx = floor( idx / timeShift ) + 1;
Dawn@4:     if( vuv( frameIdx ) == 0 )
Dawn@4:         % frame is silent
Dawn@4:         plot( formants( idx,2 ), 'w.' );
Dawn@4:         plot( formants( idx,3 ), 'w.' );
Dawn@4:         plot( formants( idx,4 ), 'w.' );
Dawn@4:     elseif( vuv( frameIdx ) == 1 )
Dawn@4:         % frame is voiced
Dawn@4:         plot( formants( idx,2 ), 'y.' );
Dawn@4:         plot( formants( idx,3 ), 'c.' );
Dawn@4:         plot( formants( idx,4 ), 'g.' );
Dawn@4:     else
Dawn@4:         %frame is unvoiced
Dawn@4:         plot( formants( idx,2 ), 'r.' );
Dawn@4:         plot( formants( idx,3 ), 'r.' );
Dawn@4:         plot( formants( idx,4 ), 'r.' );
Dawn@4:     end
Dawn@4: end