Set the intervals of x-axis using r

Question

I plot a distribution of visit time of a scenic spot from 0 to 23 hours in a day. And I want to adjust the intervals of x-axis letting all hours be displaye

Answer 1

You can use axis:

> axis(side=1, at=c(0:23))

That is, something like this:

plot(0:23, d, type='b', axes=FALSE)
axis(side=1, at=c(0:23))
axis(side=2, at=seq(0, 600, by=100))
box()