n class="va">x_data2</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>data <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/stats/Uniform.html" class="external-link">runif</a></span><span class="op">(</span><span class="fl">500</span>,<span class="fl">0</span>,<span class="fl">1</span><span class="op">)</span>,nrow <span class="op">=</span> <span class="fl">50</span>,ncol <s