USPS手写字体数据集，声明：本源程序由网络搜集整理，不承担技术及版权问题!-USPS handwriting data set, the statement: This source collected by the network, does not bear the technical and copyright issues!

几种UCI数据集，整理为excel格式，可以直接导入matlab中使用。-Several UCI datasets, finishing as excel format that can be used directly into matlab.