185,186c185,186 < xmin = datenum (ymin, sep * floor (minmonth / sep), 1); < xmax = datenum (ymin, sep * ceil (maxmonth / sep), 1); --- > xmin = datenum (ymin, floor(sep * floor (minmonth / sep)), 1); > xmax = datenum (ymin, ceil(sep * ceil (maxmonth / sep)), 1);