R-具有多个因子标签的箱线图 [英] R - boxplot with multiple factor labels
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问题描述
我正在尝试在R-cran中制作一个箱形图,该图由x轴上的两个不同因素进行分类.我的问题在于为+20级的一个因子创建标签,该标签适当地跨整个图形,而使用图例标记只有2至3级的第二个因子.
I'm working on trying to make a boxplot in R-cran that is categorized by two different factors on the x-axis. My problem lies in creating labels for one factor with +20 levels that spans the entire graph appropriately while using a legend to label the second factor which has only 2 to 3 levels.
这是一个大致模拟我的实际数据集的测试脚本:
Here is a test script that roughly mimics my actual dataset:
d<-data.frame(x=rnorm(1500),f1=rep(seq(1:20),75),f2=rep(letters[1:3],500))
# first factor has 20+ levels
d$f1<-factor(d$f1)
# second factor a,b,c
d$f2<-factor(d$f2)
boxplot(x~f2*f1,data=d,col=c("red","blue","green"),frame.plot=TRUE,axes=FALSE)
# y axis is numeric and works fine
yts=pretty(d$x,n=5)
axis(2,yts)
# I know this doesn't work; what I'd like is to spread the factors out
# so the each group of three(a,b,c) is labeled correctly
axis(1,at=seq(1:20))
# Use the legend to handle the f2 factor labels
legend(1, max(d$x), c("a", "b","c"),fill = c("red", "blue","green"))
感谢您的帮助
推荐答案
FWIW,一种ggplot2
解决方案:
FWIW, a ggplot2
solution:
library(ggplot2)
ggplot(data = d, aes(x = f1, y = x)) +
geom_boxplot(aes(fill = f2), width = 0.8) + theme_bw()
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