CODEWITHSUNDEEP
ggplot2geom-histogram
a_todd12
a_todd12

Reputation: 550

Adding stat = count on top of histogram in ggplot

I've seen some other examples (especially using geom_col() and stat_bin()) to add frequency or count numbers on top of bars. I'm trying to get this to work with geom_histogram() where I have a discrete (string), not continuous, x variable.

library(tidyverse)

d <- cars |> 
  mutate( discrete_var = factor(speed))

ggplot(d, aes(x = discrete_var)) + 
  geom_histogram(stat = "count") +
  stat_bin(binwidth=1, geom='text', color='white', aes(label=..count..),
           position=position_stack(vjust = 0.5)) +

Gives me an error because StatBin requires a continuous x variable. Any quick fix ideas?

Upvotes: 1

Views: 6816

Answers (1)

Arthur Welle
Arthur Welle

Reputation: 698

The error message gives you the answer: ! StatBin requires a continuous x variable: the x variable is discrete. Perhaps you want stat="count"?

So instead of stat_bin() use stat_count()

And for further reference here is a reproducible example:

library(tidyverse)

d <- cars |> 
  mutate( discrete_var = factor(speed))

ggplot(data = d, 
       aes(x = discrete_var)) + 
  geom_histogram(stat = "count") +
  stat_count(binwidth = 1, 
             geom = 'text', 
             color = 'white', 
             aes(label = after_stat(count)),
           position = position_stack(vjust = 0.5))

enter image description here

EDIT: As per Fkiran comment, in ggplot2 3.4.0 forwards use after_stat(count).

Upvotes: 3

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