il;&atilde;o:</u> <b>var</b><i> (<var>list</var>)</i>
<a name="IDX1426"></a>
</dt>
<dt><u>Fun&ccedil;&atilde;o:</u> <b>var</b><i> (<var>matrix</var>)</i>
<a name="IDX1427"></a>
</dt>
<dd><p>This is the sample variance, defined as
</p><pre class="example">                     n
                   ====
           2   1   \          _ 2
          s  = -    &gt;    (x - x)
               n   /       i
                   ====
                   i = 1
</pre>
<p>Exemplo:
</p>
<pre class="example">(%i1) load (descr