How to modify a legend title in a barplot with ggplot

Question

Imagine you have a simple dataset like this one:

   ive
      region   Edad
  1  Española   23
  2  Española   37
  3  Española   40
  4  Española   21
  5  Africana   29
  6  Española   42
  7   Europea   29
  8  Española   25
  9  Española   32
  10 Española   20

I am interested on performing a barplot for the variable region classifying by colour. So I created the following piece of code:

 g1 <- ggplot(ive, aes(x=reorder(ive$region, -table(ive$region)[ive$region])))
 g1 + geom_bar(aes(fill=ive$region)) + geom_text(stat='count',aes(label=..count..),vjust=-0.7) + xlab("")

But the legend of the plot displays ive$region and I want it to display a customized title.

I am almost sure it is a silly question but I have been traying to solve it for 2 days and I dont find the way to do it.

Thank you, Álvaro

So `labs(fill = "This is my custom title")`. Also, don't use `$` inside `aes()`. — Axeman, Jan 14 '17 at 12:33
`+scale_fill_discrete(guide = guide_legend(title = "Your title"))` should work as well. — Haboryme, Jan 14 '17 at 12:36
@Haboryme Or just `+scale_fill_discrete(name = "Your title")`. — Axeman, Jan 14 '17 at 14:49

score 10 · Accepted Answer · answered Jan 14 '17 at 12:36

10

ggplot(ive, aes(x=reorder(ive$region, -table(ive$region)[ive$region]))) +
  geom_bar(aes(fill=ive$region)) + 
  geom_text(stat='count',aes(label=..count..),vjust=-0.7) +
  labs(x = "", fill = "Region")

answered Jan 14 '17 at 12:36

lawyeR

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[The Wikipedia of Long Tail Programming Questions](https://blog.stackoverflow.com/2011/01/the-wikipedia-of-long-tail-programming-questions/) – Axeman Jan 14 '17 at 14:28
2

@Axeman. Thanks for the cite. I think you are saying I should have directed the OP to a post that answers his question rather than putting in this answer. Point taken. – lawyeR Jan 14 '17 at 14:46

How to modify a legend title in a barplot with ggplot

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