[PDF] ggplot2: Create Elegant Data Visualisations Using the Grammar

How do you create a boxplot in ggplot2?

If you have a data frame containing a numerical variable you can use geom_boxplot to create a box plot in ggplot2, passing the variable to aes. Alternatively you can set x = "". This will remove the values of the X axis and make the box plot thinner.

What data sets are used to create a ggplot2 boxplot?

For this ggplot2 Boxplot demo, we use two data sets provided by the R Programming, and they are: ChickWeight and diamonds data set. This example shows how to create a Boxplot using the ggplot2 package. For this demo, we will use the ChickWeight data set provided by the Studio.

How is the box plot limit calculated in ggplot2?

The ggplot2 box plots follow standard Tukey representations, and there are many references of this online and in standard statistical text books. The base R function to calculate the box plot limits is boxplot.stats. The help file for this function is very informative, but it’s often non-R users asking what exactly the plot means.

What is the purpose of geom_boxplot in ggplot2?

ggplot2.boxplot is a function, to plot easily a box plot (also known as a box and whisker plot) with R statistical software using ggplot2 package. It can also be used to customize quickly the plot parameters including main title, axis labels, legend, background and colors. ggplot2.boxplot function is from easyGgplot2 R package.