class="fl">6e4</span>,<span class="fl">28</span>,<span class="fl">28</span><span class="op">)</span><span class="op">)</span></span>
<span><span class="va">mnist_test</span><span class="op">$</span><span class="va">x</span> <span class="op">=</span> <span class="fu">keras</span><span class="fu">::</span><span class="fu"><a href="https://rdrr.io/pkg/keras/man/k_reshape.html" class="external-link">k_reshape</a></span><span class="op">(</span><span class="va">mnist_test</span><span class="op">$</span><span cla