中文说明：主成分分析并用散点图分析前三个主成分M代码，请指教。
English Description：
Principal component analysis and scatter diagram analysis of the first three principal component M code, please advise.
Principal component analysis and scatter plot analysis of the first three principal components
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中文说明：主成分分析并用散点图分析前三个主成分M代码，请指教。
English Description：
Principal component analysis and scatter diagram analysis of the first three principal component M code, please advise.