问题描述
我正在研究"R中的应用程序进行统计学习简介"(ISLR)，我只停留在第295页的一部分上，这是广义可加模型的实验室.当我运行以下代码时，出现错误Error in plot.gam(gam1, se = TRUE, col = "red") : could not find function "plot.gam".
I'm going through the "Introduction to Statistical Learning with Applications in R" (ISLR), and I'm stuck on a part on page 295, the lab on Generalized Additive Models. When I run the following code I get an error Error in plot.gam(gam1, se = TRUE, col = "red") : could not find function "plot.gam".
library(ISLR)
gam1 = lm(wage ~ ns(year, 4) + ns(age, 5) + education, data=Wage)
par(mfrow=c(1,3))
plot.gam(gam1, se=TRUE, col="red")
这本书说plot.gam应该是通用plot函数的一部分，所以R为什么找不到它?我应该做些不同的事情吗?我尝试用install.packages('plot', repos='http://cran.us.r-project.org')重新下载绘图库失败.
The book says that plot.gam should be part of the general plot function, so why can't R find it? Am I supposed to be doing something differently? I tried unsuccessfully to re-download the plot library with install.packages('plot', repos='http://cran.us.r-project.org').
这使我感到困惑，因为书上写着这样:
This confuses me because the book says this:
推荐答案
使用plot.Gam而不是plot.gam.
软件更新，但本书没有跟上.查看 gam软件包的更改日志，我们可以看到情况在2018年初有所改变:
Software updates, but the book has not kept up. Checking the change log for the gam package, we can see that the case was changed in early 2018:
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