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添加注释,添加 1988 的链接
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@@ -26,8 +26,8 @@ def pca(dataMat, topNfeat=9999999):
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dataMat 原数据集矩阵
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topNfeat 应用的N个特征
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Returns:
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lowDDataMat
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reconMat
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lowDDataMat 降维后数据集
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reconMat 新的数据集空间
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"""
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# 计算每一列的均值
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