使用R创建在X轴上具有2个变量的箱线图

Question

I am fairly new to R and want to combine 2 basic box plots into 1.

My code so far is...

library(tidyverse)
library(vegan)
spiders <- read_csv(file = "Spider Data.csv")
class(spiders)
str(spiders)
boxplot(spiders$Length_mm ~ spiders$Distance)
boxplot(spiders$Length_mm ~ spiders$Cover)

Here are the plots I have so far as well as something like what I want to create (ignore the label names in the coloured graph, I just took the picture from google, but I want something similar)

my first boxplot

my second boxplot

what I want my graph to look like (ignore labels)

Answer 1

If you wan tto stay with base R, and not other plot library, you can use at= in boxplots to say where the boxes should be displayed and col= to set different colors. This would give for example:

library(tidyverse)
library(vegan)
spiders <- read_csv(file = "Spider Data.csv")
class(spiders)
str(spiders)
boxplot(spiders$Length_mm ~ spiders$Distance, at=c(0.85,1.85), col=2, names="Good")
boxplot(spiders$Length_mm ~ spiders$Cover, at=c(1.15,2.15), col=3, names="Bad")