R Add Axes to Plot Using axis Function (Example) | Modify Ticks & Labels In this tutorial, I'll show how to create user-defined axis ticks using the axis () function in the R programming language. The tutorial contains the following information: 1) Example 1: Draw Plot with Default Axis Ticks. 2) Example 2: Draw Plot with Manually Specified Axis Ticks. 3) Example 3: Draw Plot with Axis Ticks on Top & Right Side.