n class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> x &lt;- wrapr::build_frame(</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>    "measure"                     , "training", "validation", "idx" |</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      "minus binary cross entropy", 5         , 7           , 1L    |</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      "accuracy"                  , 0.8       , 0.6         , 2L    )<