Changing axes appearance to ggplot2 plot (continous axes)
This recipe shows you how to get control over an axis within a ggplot plot.
The ggplot2 package does a great job of automatically setting the appearance of the axes, but sometimes, even in the early stages of your project, you may want your axis to appear in a specific shape, showing, for instance, a defined number of tickmarks.
This is what this recipe is all about—giving you control over the appearance of your ggplot axes.
In this example, we will use a plot based on the Iris dataset.
The Iris dataset is one of most used datasets in R tutorials and learning sessions, and it is derived from a 1936 paper by Ronald Fisher, named The use of multiple measurements in taxonomic problems.
Data was observed on 50 samples of three species of the iris flower:
- Iris setosa
- Iris virginica
- Iris versicolor
On each sample for features were recorded:
- length of the sepals
- width of the sepals
- length of the petals
- width of the petals
For a general and brief...
