The Elements of Statistical Learning第3章导读

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The Elements of Statistical Learning第3章导读

1. 公式(3.4)的推导. 可以直接对公式(3.3)中的$\beta_0$求导就得到$\hat{\beta}_0=\bar{y}-\beta_1\bar{x}$. 对公式(3.3)中的$\beta_0$求导会有: $(y_1-\hat{\beta_0}-\hat{\beta_1}x_1)x_1+(y_2-\hat{\beta_0}-\hat{\beta_1}x_2)x_2\ldots+(y_n-\hat{\beta_0}-\hat{\beta_1}x_n)x_n$ 将$\hat{\beta}_…

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This post builds on a previous post, but can be read and understood independently. As part of my course on statistical learning, we created 3D graphics to foster a more intuitive understanding of the various methods that are used to relax the assumpt…

Some 3D Graphics (rgl) for Classification with Splines and Logistic Regression (from The Elements of Statistical Learning)（转）

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《Deep Learning》第二章线性代数笔记

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4.4 R1 In which of the following problems is Case/Control Sampling LEAST likely to make a positive impact? A. Predicting a shopper's gender based on the products they buy B. Finding predictors for a certain type of cancer C. Predicting if an email is…