n class="r-in"><span class="co"># get by date range</span></span>
<span class="r-in"></span>
<span class="r-in"></span>
<span class="r-in"><span class="va">yaak_river_wy</span> <span class="op">&lt;-</span> <span class="fu"><a href="ww_floorIVUSGS.html">ww_floorIVUSGS</a></span><span class="op">(</span><span class="va">yaak_river_dv</span>,</span>
<span class="r-in">                                options <span class="op">=</span> <span class="fu">wwOptions</span><span class="op">(</span>date_range <span cl