.lang.String&nbsp;key)</code>
<div class="block">Remove a named variable from the map.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../weka/core/Environment.html#substitute(java.lang.String)">substitute</a></strong>(java.lang.String&nbsp;source)</code>
<div class="block">Substitute a variable names for their values in the given string.</div>
</td>
</tr>
</table>
<ul class="blockList">
<li class="blockList"><a na