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R 语言经典实例(原书第 2 版)
book

R 语言经典实例(原书第 2 版)

by J.D. Long, Paul Teetor
June 2020
Beginner to intermediate
522 pages
9h 6m
Chinese
China Machine Press
Content preview from R 语言经典实例(原书第 2 版)
线性回归和方差分析
341
11.15 绘制回归残差
11.15.1 问题
需要直观地显示回归残差。
11.15.2 解决方案
你可以使用 broom 包将模型结果放入数据框中,然后使用 ggplot 绘图:
m <- lm(y ~ x1 + x2)
library(broom)
augmented_m <- augment(m)
ggplot(augmented_m, aes(x = .fitted, y = .resid)) +
geom_point()
使用先前方法中的线性模型 m,我们可以创建一个简单的残差图:
library(broom)
augmented_m <- augment(m)
ggplot(augmented_m, aes(x = .fitted, y = .resid)) +
geom_point()
输出如图 11-5 所示。
.fitted
.resid
30
20
10
0
-
10
-
20
-
100 100 2000
11-5:模型残差图
你还可以使用基础 R plot 方法快速查看,但它将生成基础 R 图形输出,而不是
ggplot 图形:
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Publisher Resources

ISBN: 9787111656814