说明：  matlab中PCA-fisher判别法，对数据降维有很好的效果，附件中是matlab2007源程序，不同的matlab版本需要稍微修改一下；谢谢
(Discriminant law PCA-fisher MATLAB, to reduce the dimension of data have a good effect, accessory is the MATLAB2007 source code, a different version of the MATLAB needs to be slightly modified thank you )