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How to align the bars of a barplot with the X-axis using ggplot2 in R?
The bar plot is created with geom_bar function but there always exist some space between the bars and the X-axis labels. If we want to reduce that space or completely remove it we need to use scale_y_continuous function by defining expand argument for former and scale_y_continuous(expand=c(0,0)) for latter.
Example
Consider the below data frame −
set.seed(888) x<-c("S1","S2","S3","S4") y<-c(24,27,25,28) df<-data.frame(x,y) df
Output
x y 1 S1 24 2 S2 27 3 S3 25 4 S4 28
Loading ggplot2 package and creating bar plot of y −
library(ggplot2) ggplot(df,aes(x,y))+geom_bar(stat="identity")
Output
Creating the bar plot without space between X-axis labels and the bars −
ggplot(df,aes(x,y))+geom_bar(stat="identity")+scale_y_continuous(expand=c(0,0))
Output
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