
                  i = 1
</pre>

<p>Ejemplo:
</p>
<pre class="example">(%i1) load (descriptive)$
(%i2) s1 : read_list (file_search (&quot;pidigits.data&quot;))$
(%i3) central_moment (s1, 2), numer; /* the variance */
(%o3)                   8.425899999999999
(%i5) s2 : read_matrix (file_search (&quot;wind.data&quot;))$
(%o5) [11.29584771375004, 16.97988248298583, 5.626661952750102, 
                             37.5986572057918, 25.85981904394192]
(%i6) central_moment (s2, 3);
</pre>
<p>Véanse también <co