ere must be in a
row or column for it to be considered missing and this removed. This option
is only used in matrix mode; it is silently ignored in vector mode.
</p>
<p>Returns:
  <var class="var">out</var> - the input, with missing elements or rows or columns removed
  <var class="var">tf</var> - a logical index vector indicating which elements, rows, or columns were removed
</p>
</dd></dl>


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