Draw Barplot with Standard Error Bars in R (Example Code)
In this R tutorial you’ll learn how to draw a barchart with standard error bars.
Creating Example Data
data(iris) # Example data head(iris) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 5.1 3.5 1.4 0.2 setosa # 2 4.9 3.0 1.4 0.2 setosa # 3 4.7 3.2 1.3 0.2 setosa # 4 4.6 3.1 1.5 0.2 setosa # 5 5.0 3.6 1.4 0.2 setosa # 6 5.4 3.9 1.7 0.4 setosa |
Example: Add Standard Error Bars to Barchart Using stat_summary() Function of ggplot2 Package
install.packages("ggplot2") # Install & load ggplot2 library("ggplot2") |
ggplot(iris, # Draw ggplot2 barplot with error bars aes(x = Sepal.Length, y = Species, fill = Species)) + coord_flip() + stat_summary(geom = "bar", fun = mean, position = "dodge") + stat_summary(geom = "errorbar", fun.data = mean_se, position = "dodge") |
Related Tutorials
Have a look at the following R programming tutorials. They explain topics such as regression models and coding errors.