"r-in"><span>  <span class="va">res</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/matrix.html" class="external-link">matrix</a></span><span class="op">(</span><span class="cn">NA</span>, ncol <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/length.html" class="external-link">length</a></span><span class="op">(</span><span class="va">times</span><span class="op">)</span>, nrow <span class="op">=</span> <span class="fu"><a href="https://rdrr.io