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How to create boxplot for multiple categories with long names in base R?
In base R, we use boxplot function to create the boxplots but if we have categorical vector and the corresponding numerical vector then the boxplot can be easily created. For this purpose, we should save those vectors in a data frame and use the $ operator and las = 2 argument to create the boxplot as shown in the below example.
Example
Consider the below vectors:
Countries<−sample(c("China","India","Canada","USA","Russia","Indonesia","Nepal"),5000,replace=TRUE)
> Rate<−rnorm(5000,10,1)Create the data frame using above vectors −
df<−data.frame(Countries,Rate) > head(df,20)
Output
Countries Rate 1 Russia 9.885246 2 Nepal 9.895285 3 USA 11.524113 4 Nepal 10.133226 5 Indonesia 9.711389 6 Russia 10.017597 7 Nepal 9.204832 8 Russia 8.436829 9 Russia 10.579013 10 Canada 7.984238 11 Canada 9.407908 12 Indonesia 9.047598 13 China 9.193126 14 India 8.524555 15 China 10.398155 16 India 6.926581 17 China 10.104521 18 Canada 10.178826 19 India 12.006973 20 Canada 10.371956
Creating boxplot for countries −
boxplot(df$Rate~df$Countries)
Output
Creating boxplot for countries by changing the printing direction of country’s name −
boxplot(df$Rate~df$Countries,las=2,xlab="")
Output
Updated on: 17-Oct-2020
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