How can I use faceting in ggplot2?

How can I use faceting in ggplot2?

Faceting in ggplot2 allows you to create multiple plots based on a factor variable. You can use facet_wrap() or facet_grid().

Can you give me an example of using facet_wrap?

Sure! Here's a simple example:

library(ggplot2)

# Sample data
mpg <- ggplot2::mpg

# Basic faceting
ggplot(mpg, aes(x=displ, y=hwy)) + 
  geom_point() + 
  facet_wrap(~ class)

What if I want to facet by two variables?

You can use facet_grid() for that. For example:

ggplot(mpg, aes(x=displ, y=hwy)) + 
  geom_point() + 
  facet_grid(drv ~ class)

Can I customize the appearance of the facets?

Yes, you can customize titles, labels, and themes using functions like labs() and theme(). For example:

ggplot(mpg, aes(x=displ, y=hwy)) + 
  geom_point() + 
  facet_wrap(~ class) + 
  labs(title='Fuel Efficiency by Class') + 
  theme_minimal()