Change point size of a ggplot object after being returned from a function

Question

Suppose I have a function that returns a ggplot object:

getplot = function() {
    x = rnorm(16)
    y = rnorm(16)
    dat = data.frame(x, y)
    myplot = ggplot(dat, aes(x, y)) + geom_point()
    myplot
}

After calling that function

x = getplot()

, how can I change the point size?

You can also include size argument in your function and let user to supply it in function `getplot()` call — Didzis Elferts, Jun 17 '14 at 15:23

score 7 · Accepted Answer · answered Jun 17 '14 at 15:27

7

maybe you can use update_geom_defaults :

Modify geom/stat aesthetic defaults for future plots

So to change size:

getplot()
update_geom_defaults("point",list(size=10))

answered Jun 17 '14 at 15:27

agstudy

2

spooky, how it modifies the printing of x previously created. – baptiste Jun 17 '14 at 17:55

score 4 · Answer 2 · edited Jun 17 '14 at 21:42

4

Try this:

x = getplot() + geom_point(size=N)

edited Jun 17 '14 at 21:42

tbodt

answered Jun 17 '14 at 21:20

qed

2 Answers2