l&oacute;gica n&uacute;mero 1 e menor que 25 n&oacute;s na esta&ccedil;&atilde;o meteorol&oacute;gica n&uacute;mero 4,
</p>
<pre class="example">(%i1) load (descriptive)$
(%i2) load (numericalio)$
(%i3) s2 : read_matrix (file_search (&quot;wind.data&quot;))$
(%i4) subsample (s2, '(%c[1] &gt;= 16 and %c[4] &lt; 25), 1, 2, 5);
                     [ 19.38  15.37  25.25 ]
                     [                     ]
                     [ 17.33  14.67  19.58 ]
(%o4)                [                     ]
     