label="anchor" href="#arg-data"></a></dt>
<dd><p><code>NULL</code>, <code>matrix</code>, <code>Matrix</code>, <code>data.frame</code>
or <code>list</code> of <code>matrix</code>, <code>Matrix</code>, or <code>data.frame</code>
objects. The argument to data shows which planning units should be treated
as being connected when implementing constraints to ensure that features
are represented in contiguous units. If different features have
different dispersal capabilities, then it may be desirable to specify
whi