Adding colors in R for Boxplot

Question

boxplot(mtcars$mpg ~ mtcars$cyl, main = "Box Plot of Mileage vs Number of Cylinders", xlab = "Number of Cylinders", ylab = "Miles per Gallon", col = "lightgreen")

I have this code and all the boxed are green, what can i add to this to make the boxes different colors

you can pass a vector of values in `col` Here, there are 3 boxplots, so the number of colours can be 3. `boxplot(mtcars$mpg ~ mtcars$cyl, main = "Box Plot of Mileage vs Number of Cylinders", xlab = "Number of Cylinders", ylab = "Miles per Gallon", col = c("lightgreen", "red", "blue"))` — akrun, May 21 '20 at 03:17
Does this answer your question? [Colouring different group data in boxplot using r](https://stackoverflow.com/questions/15212884/colouring-different-group-data-in-boxplot-using-r) — UseR10085, May 21 '20 at 04:34

score 0 · Answer 1 · answered May 21 '20 at 03:49

You just need to add a factor(x_axis_var) for color.

boxplot(mtcars$mpg ~ mtcars$cyl, 
        main = "Box Plot of Mileage vs Number of Cylinders", 
        xlab = "Number of Cylinders", 
        ylab = "Miles per Gallon", col = factor(mtcars$cyl))

or provide a vector of colors:

boxplot(mtcars$mpg ~ mtcars$cyl, 
        main = "Box Plot of Mileage vs Number of Cylinders", 
        xlab = "Number of Cylinders", 
        ylab = "Miles per Gallon", col = c("blue","red","green"))

Did this help you? Consider accepting the answer if it helped you. — Shan R, May 23 '20 at 21:49

Adding colors in R for Boxplot

1 Answers1