ection data must be manually defined
using one of the other formats below when the planning unit data
in the argument to <code>x</code> is not spatially referenced (e.g.,
in <code>data.frame</code> or <code>numeric</code> format).</p></dd>


<dt><code>data</code> as a<code>matrix</code>/<code>Matrix</code> object</dt>
<dd><p>where rows and columns represent
different planning units and the value of each cell indicates if the
two planning units are connected or not. Cell values should be binary
<code>numeric