Barplot | the R Graph Gallery

Step by step - ggplot2 and geom_bar()

ggplot2 allows to build barplot thanks to the geom_bar() function. The examples below will guide you through the basics of this tool:

Most basic barplot

The most basic barplot you can do with geom_bar(), using default settings.

Custom color

A few examples showing how to custom barplot color.

Horizontal barchart

It makes sense to make your barchart horizontal: group labels are now much easier to read

Bar width

You can control bar width using the width argument of geom_bar()

Control group order

Reordering categories in the barchart is a crucial step for an insightful figure: learn how to do it.

Variable width

A barplot with variable width to represent categories sample size.

Error bars

How to add error bars on a barplot, and why should be careful about it.

Basic R and the barplot() function

Basic R can build quality barplots thanks to the barplot() function. Here is a list of examples guiding you through the most common customization you will need.

Most basic

Most basic usage of the barplot() function.

Control color

How to control barplot color, how to pick a nice color palette.

General customization

Title, axis labels, axis limits, and more.

Horizontal barplot

A horizontal version of the barplot, thanks to the horiz argument.

Bar width

Play with bar width and space between bars.

Bar texture

Change bar texture with the density and angle parameters of the barplot function.

Axis features

Change font, color and size of axis labels and titles

Increase margin

Increase margin size with the mar argument of the par function

Add error bars

Add error bars on barplot to show confidence interval or standard deviation

Number of obs

Add number of observation on top of barplot, and other customization