a></span><span class="op">(</span><span class="st">"extdata"</span>, <span class="st">"habitat_hi_res.tif"</span>, package <span class="op">=</span> <span class="st">"restoptr"</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># create problem</span></span></span>
<span class="r-in"><span><span class="va">problem</span> <span class="op">&lt;-</span> <span class="fu">