How to create bar chart based on two groups in an R data frame?

To create a bar chart based on two groups, we can use geom_bar function of ggplot2 package with position argument that defines the position of the groups. For example, if we have a data frame called df that contains two categorical variable x1 and x2 and the one response variable y then the bar chart can be created by using the below command −

ggplot(df,aes(x1,y,fill=x2))+geom_bar(position=position_dodge(),stat="identity")

Example

library(ggplot2)
ggplot(df,aes(Age_Group,Y,fill=Gender))+geom_bar(position=position_dodge(),stat="identity")

Output