      </h4>
      <p class="shortcomment cmt">Cumulative product for each column; each successive element of the output is the cumulative
product from the initial element, ignoring NAs.</p>
    </li><li visbl="pub" name="org.saddle.stats.FrameStats#cumSum" data-isabs="false">
      <a id="cumSum((Vec[T]) ⇒ VecExpandingStats[T]):Frame[RX, CX, T]"></a>
      <h4 class="signature">
      <span class="modifier_kind">
        <span class="modifier"></span>
        <span class="kind">def</span>
      </span>
  