I have a variable ceroonce which is number of schools per county (integers) in 2011. When I plot it with boxplot()
it only requires the ceroonce variable. A boxplot
ggplot(escuelas, aes(x="ceroonce", y=ceroonce))+geom_boxplot()
ggplot will interpret the character string "ceroonce" as a vector with the same length as the ceroonce column and it will give the result you're looking for.
This could work for you:
ggplot(escuelas, aes(x= "", y=ceroncee)) + geom_boxplot()
There are no fancy statistics happening here. boxplot
is simply assuming that since you've given it a single vector, that you want a single box in your boxplot. ggplot
and geom_histogram
simply don't make that assumption.
If you want a bit less typing, you can do this:
qplot(y=escuelas$ceroonce, x= 1, geom = "boxplot")
ggplot2 will automatically create a vector of 1s equal in length to the length of escuelas$ceroonce