s the `...` of the recipes package but requires
variables to be included within `c()`.  For example to include variables x
and y you would write `c(x,y)` in the hydrorecipes package.</p></dd>


<dt id="arg-spans">spans<a class="anchor" aria-label="anchor" href="#arg-spans"></a></dt>
<dd><p>vector of odd integers giving the widths of modified
    Daniell smoothers to be used to smooth the periodogram.</p></dd>


<dt id="arg-detrend">detrend<a class="anchor" aria-label="anchor" href="#arg-detrend"></a></dt>
<