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How to fill bars of a bar plot created using ggplot2 with colors based on frequency?
To fill bars in a bar plot using ggplot2 in R with colors based on frequency, we can use fill argument with count.
For Example, if we have a data frame called df that contains a single column X that contains repeated values and we want to create bar plot of values in X based on their frequencies then we can use the below command −
ggplot(df)+geom_bar(aes(X,fill=..count..))
Example
Consider the data frame given below −
x<-rpois(20,2) df<-data.frame(x) df
The following dataframe is created
x 1 1 2 2 3 2 4 3 5 1 6 0 7 3 8 3 9 3 10 2 11 1 12 1 13 1 14 2 15 1 16 1 17 0 18 2 19 4 20 1
To load the ggplot2 package and create bar chart filled with colors based on frequency of values in x on the above created data frame, add the following code to the above snippet −
x<-rpois(20,2) df<-data.frame(x) library(ggplot2) ggplot(df)+geom_bar(aes(x,fill=..count..))
Output
If you execute all the above given snippets as a single program, it generates the following Output −
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