主成分分析
From Ufldl
(→Recovering an Approximation of the Data 数据还原) |
(→Recovering an Approximation of the Data 数据还原) |
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| Line 455: | Line 455: | ||
= \sum_{i=1}^k u_i \tilde{x}_i. | = \sum_{i=1}^k u_i \tilde{x}_i. | ||
\end{align}</math> | \end{align}</math> | ||
| + | |||
【原文】：The final equality above comes from the definition of <math>\textstyle U</math> [[#Example and Mathematical Background|given earlier]]. | 【原文】：The final equality above comes from the definition of <math>\textstyle U</math> [[#Example and Mathematical Background|given earlier]]. | ||
