Is there a way to increase the height of the strip.text bar in a facet?

Question

I would like the grey bar at the top to be wider, as in, have the edges of it a little further from the top and bottom of the letters (the strip.text - A, B, C etc). I would have thought the lineheight would have acted as padding but it doesn't.

ggplot(diamonds, aes(carat, price, fill = ..density..)) +
  xlim(0, 2) + stat_binhex(na.rm = TRUE)+
  facet_wrap(~ color) +
  theme(strip.text = element_text(lineheight=20))

@alexwhan, increasing the text size will increase the strip size as well, but it will not change the *ratio* of the two — Ricardo Saporta, Jul 24 '13 at 05:35

score 24 · Accepted Answer · answered Jul 24 '13 at 04:59

24

First, modify the levels so that they include a linebreak:

levels(diamonds$color) <- paste0(" \n", levels(diamonds$color) , "\n ")

Then adjust as necessary. eg:

P <- ggplot(diamonds, aes(carat, price, fill = ..density..)) +
      xlim(0, 2) + stat_binhex(na.rm = TRUE)+
      facet_wrap(~ color)

P +  theme(strip.text = element_text(size=9, lineheight=0.5))

lineheight=0.5

P +  theme(strip.text = element_text(size=9, lineheight=3.0))

lineheight=3.0

answered Jul 24 '13 at 04:59

Ricardo Saporta

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Delayed reply on my part... Thanks, a dirty solution let's be honest haha, but certainly get's the job done. Appreciate your help. – nzcoops Aug 29 '13 at 00:27

score 1 · Answer 2 · answered Jan 03 '17 at 21:41

With ggplot2 2.2.0, you can apply Ricardo's trick without modifying the dataframe, by using labeller:

P <- ggplot(diamonds, aes(carat, price, fill = ..density..)) +
  xlim(0, 2) + stat_binhex(na.rm = TRUE)+
  facet_wrap(~ color, labeller = labeller(color=setNames(paste0("\n", levels(diamonds$color), "\n"), levels(diamonds$color))))

P +  theme(strip.text = element_text(size=9, lineheight=0.5))

Is there a way to increase the height of the strip.text bar in a facet?

2 Answers2

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