13) who use May to</span>
0005 <span class="comment">%   September as low flow season and November to April as high flow season.</span>
0006 <span class="comment">%</span>
0007 <span class="comment">%   INPUT</span>
0008 <span class="comment">%   X: time series - should be continuous (e.g. Q, typically [mm/timestep])</span>
0009 <span class="comment">%   t: time [Matlab datetime]</span>
0010 <span class="comment">%   subperiod: subperiod to be extracted, e.g. [11:12, 1:4] for November</span>
0011 <span clas