e"><a name="l00040"></a><span class="lineno">   40</span>&#160;    if ~ischar(<span class="keywordtype">string</span>)</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        error(&#39;new_string must be a <span class="keywordtype">string</span>.&#39;);</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    end</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    % Make sure the save directory exists</div><