u'><a href='https://rdrr.io/r/base/unlist.html'>unlist</a></span><span class='op'>(</span><span class='va'>x_test</span><span class='op'>)</span>, ncol <span class='op'>=</span> <span class='fl'>1</span><span class='op'>)</span>
<span class='va'>y_train</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/array.html'>array</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/unlist.html'>unlist</a></span><span class='op'>(</span><span class='va