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RStudio for R Statistical Computing Cookbook by Andrea Cirillo

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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 ...

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