[R] Alphabetical sequence of data along the x-axis in a box plot

[Dan_K]

The easiest work-around I've found for this problem is to create a vector in
your data frame just using numbers to order them how you want, create a
separate "labeling" data frame with those numbers and corresponding text
labels, and then enter the vector with the grouping names from the labeling
frame in boxplot's 'names' argument. As such:


dir <- "D:\\"
setwd(dir)
data <- read.csv("ODR.csv")
type <- read.csv("soil_type.csv")

boxplot(data=data, Sat..ODR~Type_num, *names=type$Soil.type*, col="light
green", main="ODR by soil type", xlab="Soil type", ylab="ODR")


The labeling data frame should look something like this:

> data.frame(type)
  Type_num Soil.type
1        1       DCL
2        2       UCL
3        3      Sand


Hope this helps!

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