barplot in a factor variable with ggplot2 R-CodePudding

I have a factor variable (chest) with 4 levels:

  1   2   3   4 
 23  49  84 143

I want to create a barplot. In the normal way I have this and it works:

barplot(summary(chest))

I wanted to do a more elaborate barplot using ggplot

ggplot(data=chest, aes(x="Chest_pain"))  
    geom_bar( fill="steelblue") 
    geom_text(aes(label=len), vjust=-0.3, size=3.5) 
    theme_minimal()

I got 'Error: data must be a data frame, or other object coercible by fortify(), not a factor.'

How can I resolve this?

CodePudding user response：

It seems we can reproduce your data like this:

chest <- factor(rep(1:4, times = c(23, 49, 84, 143)))

So that we have

summary(chest)
#>   1   2   3   4 
#>  23  49  84 143

and can get a base R bar plot with your code as follows:

barplot(summary(chest))

To get a ggplot we can do:

library(ggplot2)

ggplot(mapping = aes(x = chest))  
  geom_bar(fill = "steelblue")  
  geom_text(stat = "count", aes(label = stat(count)), vjust = -0.3, size = 3.5)  
  theme_minimal()

^{Created on 2022-11-06 with reprex v2.0.2}