he calculation ("sites" or "branch")</p></dd>


<dt id="arg-windows">windows<a class="anchor" aria-label="anchor" href="#arg-windows"></a></dt>
<dd><p>Coordinates of breakpoints between windows. The first
coordinate (0) and the last coordinate (equal to <code>ts$sequence_length</code>)
are added automatically)</p></dd>


<dt id="arg-span-normalise">span_normalise<a class="anchor" aria-label="anchor" href="#arg-span-normalise"></a></dt>
<dd><p>Argument passed to tskit's <code>allele_frequency_spectrum</code>