lass="lineno">  260</span>&#160;</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    %compute and <span class="keyword">set</span> gray colormap</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;    oldcmap = <span class="keyword">get</span>(H,<span class="stringliteral">&#39;Colormap&#39;</span>);</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    newgrays = 0.30*oldcmap(:,1) + 0.59*oldcmap(:,2) + 0.11*o