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Create bar plot of one column in an R data frame using ggplot2.
To create bar plot of one column in an R data frame using ggplot2, we can use rownames of the data frame as x variable in aes.
For Example, if we have a data frame called df that contains two columns say X and Y and we want to create the bar plot of values in Y then we can use the below mentioned command −
ggplot(df,aes(rownames(df),Y))+geom_bar(stat="identity")
Example
Following snippet creates a sample data frame −
x1<-rpois(5,10) x2<-rpois(5,2) x3<-rpois(5,5) df<-data.frame(x1,x2,x3) df
The following dataframe is created
x1 x2 x3 1 9 2 7 2 9 2 3 3 13 1 3 4 13 3 8 5 11 1 1
To load ggplot2 package and create bar plot for data in column x2 of df on the above created data frame, add the following code to the above snippet −
x1<-rpois(5,10) x2<-rpois(5,2) x3<-rpois(5,5) df<-data.frame(x1,x2,x3) library(ggplot2) ggplot(df,aes(rownames(df),x2))+geom_bar(stat="identity")
Output
If you execute the above given snippet, it generates the following Output −
Updated on: 08-Nov-2021
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