</a>	prufer --- convert a tree to/from its Prufer code</li><li><a href="random.html" class="code" title="function random(g,arg1,arg2)">random</a>	random --- overwrite g with a random graph</li><li><a href="randxy.html" class="code" title="function randxy(g)">randxy</a>	randxy(g) --- give g a random embedding in the plane</li><li><a href="renumber.html" class="code" title="function renumber(g,perm)">renumber</a>	renumber the vertices of a graph</li><li><a href="resistance.html" class="code" title="function R