应用小区域方差对比，程序简单，对信号进行频谱分析及滤波，isodata 迭代自组织的数据分析，是学习PCA特征提取的很好的学习资料，相关分析过程的matlab方法，迭代自组织数据分析。- Application of small area variance comparison, simple procedures, The signal spectral analysis and filtering, Isodata iterative self-organizing data analysis, Is a good learning materials to learn PCA feature extraction, Correlation analysis process matlab method, Iterative self-organizing data analysis.