Syntax error How to create bar plot of means with error bars of standard deviations using ggplot2 in R?

How to create bar plot of means with error bars of standard deviations using ggplot2 in R?

If we have summary data for a group variable then we might want to look at the errors or say differences between mean and standard deviations visually, therefore, we can create a bar plot with error bars of standard deviations. This can be done by using geom_errorbar function of ggplot2 package.

Example

Consider the below data frame −

 Live Demo

Group<-c("A","B","C","D")
Mean<-c(24,28,25,24)
SD<-c(2,5,4,3)
df<-data.frame(Group,Mean,SD)
df

Output

 Group Mean SD
1  A   24    2
2  B   28    5
3  C   25    4
4  D   24    3

Loading ggplot2 package and creating bar plot of means −

Example

library(ggplot2)
ggplot(df,aes(Group,Mean))+geom_bar(stat="identity")

Output

Creating bar plot with error bars of standard deviations −

Example

ggplot(df,aes(Group,Mean))+geom_bar(stat="identity")+geom_errorbar(aes(x=Group,ym
in=Mean-SD,ymax=Mean+SD))

Output

Updated on: 2020-09-08T11:19:25+05:30

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