What is the default unit of annotate() in ggplot2?

Question

I've been looking what seems to be everywhere. I would like to know what the default unit size of annotate() is in ggplot2, as I'm not able to set size to a specific unit in annotate().

For example, I tried the following, but it didn't work:

annotate(geom = "text", label = "Am I a bird?",
           x = "ABC", y = 2375/2,
           family = "Arial", size = unit(10, "mm"), colour = "white")

Error in checkNA("fontsize") : 
  mixture of missing and non-missing values for fontsize

Thanks for your help!

The size of text is measured in mm. Simply using size = 10 therefore results in a font size of 10mm. If you want want to draw a 10pt text instead, set size = 10 / ggplot2::.pt. See ggplot2.tidyverse.org/articles/ggplot2-specs.html#text. — stefan
– stefan, Commented Mar 23, 2020 at 21:58
funnily, this is a constant. To convert to your desired pt, factorise your annotate font size by 5/14 — tjebo
– tjebo, Commented Mar 23, 2020 at 23:59
That worked perfectly, @Tjebo ! Thanks a lot. How did you know it was exactly that factor? Is there an online resource somewhere? — Will M
– Will M, Commented Mar 24, 2020 at 0:04
I saw it a couple of years ago somewhere. One of those things... The online resource is actually provided by @IanCampbell in their answer - 14/5 is roughly the same. — tjebo
– tjebo, Commented Mar 24, 2020 at 0:08
here we go - I think this was the thread. stackoverflow.com/questions/25061822/… — tjebo
– tjebo, Commented Mar 24, 2020 at 0:11

Ian Campbell · Accepted Answer · 2020-03-23 21:40:13Z

4

It says here that the default unit is mm. So if you want to go from points to mm multiply by 72.27 / 25.4.

answered Mar 23, 2020 at 21:40

Ian Campbell

25.2k14 gold badges43 silver badges62 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

What is the default unit of annotate() in ggplot2?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related