中文说明：
带有数据的PCA程序，计算方差贡献率确定主元数，有T方和SPE图
English Description：
PCA program with data, calculation of variance contribution rate to determine the number of principal components, there are T-square and SPE chart
PCA program with data calculates variance contribution rate to determine the number of principal com
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中文说明：
带有数据的PCA程序，计算方差贡献率确定主元数，有T方和SPE图
English Description：
PCA program with data, calculation of variance contribution rate to determine the number of principal components, there are T-square and SPE chart
PCA.m