删除 plot glmnet 中的上轴

Question

当使用 glmnet 绘制系数路径图时，我想删除图上方的轴。

这个轴怎么去掉？我在网上找到了这个玩具示例：

library(glmnet)
age <- c(4,8,7,12,6,9,10,14,7) 
gender <- c(1,0,1,1,1,0,1,0,0) ; gender<-as.factor(gender)
bmi_p <- c(0.86,0.45,0.99,0.84,0.85,0.67,0.91,0.29,0.88) 
m_edu <- c(0,1,1,2,2,3,2,0,1); m_edu<-as.factor(m_edu)
p_edu <- c(0,2,2,2,2,3,2,0,0); p_edu<-as.factor(p_edu)
f_color <- c("blue", "blue", "yellow", "red", "red", "yellow", "yellow", "red", "yellow")
asthma <- c(1,1,0,1,0,0,0,1,1)
f_color <- as.factor(f_color)
xfactors <- model.matrix(asthma ~ gender + m_edu + p_edu + f_color)[,-1]
x <- as.matrix(data.frame(age, bmi_p, xfactors))
glmmod<-glmnet(x,y=as.factor(asthma),alpha=1,family='binomial')
plot(glmmod,xvar="lambda", axes=FALSE)

Answer 1

我猜这个不需要的轴是用 axis 函数制作的。我们可以再用一次这个函数来覆盖它。技巧如下：

1) 创建一个序列，其中包含许多要绘制刻度线的点。

2) 把它们变大（向上加长）

3) 加大轴的宽度

4) 更改白色并关闭标签

plot(glmmod, xvar = "lambda", axes = F, xlab = "", ylab = "")
axis(side = 3,
     at = seq(par("usr")[1], par("usr")[2], len = 1000), 
     tck = -0.5,
     lwd = 2, 
     col = "white", 
     labels = F)

删除 plot glmnet 中的上轴

Remove upper axis in plot glmnet

r

plot

glmnet