ummary information on
solutions. See details below for more information.</p></dd>


<dt>selections</dt>
<dd><p><code><a href="https://rdrr.io/r/base/matrix.html" class="external-link">base::matrix()</a></code> with binary selections. The
cell \(x_{ij}\) denotes if planning unit \(j\) is selected in the
\(i\)'th solution.</p></dd>


<dt>amount.held</dt>
<dd><p><code><a href="https://rdrr.io/r/base/matrix.html" class="external-link">base::matrix()</a></code> with the amount held for each
species in each solut