多种图论算法的matlab实现
例如：% ntest=1 - grBase求有向图的基
% ntest=2 - grCoBase求有向图的逆基
% ntest=3 - grCoCycleBasis求连通图的基本割集
% ntest=4 - grColEdge图的边着色（边染色）
% ntest=5 - grColVer图的点着色（节点染色）(% grBase - find all bases of digraph;
% grCoBase - find all contrabases of digraph;
% grCoCycleBasis - find all independent cut-sets for a connected graph;
% grColEdge - solve the color problem for graph edges;)