r - 使用glm构建逻辑回归模型时排除多于一列

Question

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Answer 1

?formula 提到您可以使用 - 删除术语。方法如下:

glm(Vote ~. -ID, data = train, family = binomial)

g = glm(Vote ~. - ID - YOB - ABC, data = train, family = binomial)

好吧，我可以给你举个例子:

> head(trees) ## this is R's built-in dataset

  Girth Height Volume
1   8.3     70   10.3
2   8.6     65   10.3
3   8.8     63   10.2
4  10.5     72   16.4
5  10.7     81   18.8
6  10.8     83   19.7

现在我们构建一个模型，删除 Girth 和 Height:

> lm(Volume ~. -Girth - Height, trees)

Call:
lm(formula = Volume ~ . - Girth - Height, data = trees)

Coefficients:
(Intercept)  
      30.17  

现在您看到只估计截距。