说明：  菜登和何晓飞, 2010的PAMI 基于图的非负矩阵分解的paper极其matlab代码。这篇文章在非负矩阵分解中巧妙地加入了流形约束，并推导出了相应的迭代公式。
(He Xiaofei Teng and vegetables, 2010 PAMI graph-based non-negative matrix factorization of the paper is extremely matlab code. This article in the non-negative matrix factorization in the cleverly joined the manifold constraints, and derive the corresponding iterative formula.)