Create a multiple bar chart

Introduction

We have already covered creating basic bar graphs here.

If we want to create multiple bar chart then we will use the position=”dodge” argument in geom_bar(..) function. We also specify the category for creating multiple bars using fill=<categorical variable> in the aes(…) function.

Procedure

We will be working with the ggplot2::diamonds dataset, few rows of the data are:

We will create bar graph which shows the count for each category of diamond cut and create multiple bars based on clarity of diamond.

Code

 
library(ggplot2)
# multiple bar based on clarity
ggplot(data = diamonds) + geom_bar(mapping = aes(x = cut, fill = clarity), position = "dodge")

And the output of above code is:

Conclusion

Thus we have successfully created multiple bar chart.

References

• https://r4ds.had.co.nz/