public static&nbsp;void&nbsp;checkRexpand&#8203;(<a href="MatrixBlock.html" title="class in org.apache.sysds.runtime.matrix.data">MatrixBlock</a>&nbsp;in,
                                boolean&nbsp;ignore)</pre>
<div class="block">Quick check if the input is valid for rexpand, this check does not guarantee that the input is valid for rexpand</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>in</code> - Input matrix block</dd>
<dd><code>ignore</code> - If zero valued cells should be