>
<span class="r-in"><span><span class="co"># create minimal problem with multiple zones, and limit the solver to</span></span></span>
<span class="r-in"><span><span class="co"># 30 seconds to obtain solutions in a feasible period of time</span></span></span>
<span class="r-in"><span><span class="va">p5</span> <span class="op">&lt;-</span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="problem.html">problem</a></span><span class="op">(</span><span class="va">sim_zones_pu_raster</span>, <