How do I change the axis values on a boxplot in R?

Question

I am working on some code where I have to plot MPG of all types of cars over several years. I am using geom="boxplot" in R and it returns the boxplots, but puts all the years as the axis values. I would like it to return all the boxplots, but only list every five years, i.e. 1985, 1990, 1995, etc.

Below is the following code that I am using:

qplot(factor(year), comb08, data=car, geom="boxplot", xlab="Year", ylab="MPG")

Otherwise, try scale_x_continuous(breaks=seq(Year[1],Year[length(Year)],by=5)) to set 5 year breaks — harkmug
– harkmug, Commented May 6, 2013 at 19:27

user1471980 · Accepted Answer · 2013-05-06 19:29:50Z

1

library(scales)
scale_x_date(breaks = "5 years", labels=date_format("%Y"))

answered May 6, 2013 at 19:29

user1471980

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