           options <span class="op">=</span> <span class="fu">wwOptions</span><span class="op">(</span>floor_iv <span class="op">=</span> <span class="st">'6-hour'</span><span class="op">)</span><span class="op">)</span></span>
<span class="r-in"></span>
<span class="r-in"><span class="co">#change number of days</span></span>
<span class="r-in"></span>
<span class="r-in"><span class="va">yaak_river_iv</span> <span class="op">&lt;-</span> <span class="fu"><a href="ww_floorIVUSGS.html">ww_floorIVUSGS</a></spa