中文说明：复杂网络BA模型matlab代码，返回网络图的邻接矩阵，代码中采用稀疏矩阵，极大地释放内存，提高效率。
English Description：
The matlab code of BA model of complex network returns the adjacency matrix of network graph. The sparse matrix is used in the code, which greatly releases memory and improves efficiency.