mpty</a></span>&#8203;(<a href="MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
       <a href="MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;ret,
       boolean&nbsp;rows,
       boolean&nbsp;emptyReturn,
       <a href="MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;select)</code></th>
<td class="colLast">
<div class="block">CP rmempty operation (single input, singl