How can I use facets in ggplot2 to create multiple plots?

How can I use facets in ggplot2 to create multiple plots?

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

Can you show me an example of using facet_wrap?

Sure! Here's a simple example:

library(ggplot2)

# Sample data
mpg <- ggplot2::mpg

# Create a plot with facets
ggplot(mpg, aes(x=displ, y=hwy)) + 
  geom_point() + 
  facet_wrap(~ class)

What if I want to customize the number of rows and columns in the facets?

You can customize the number of rows and columns by using the nrow and ncol arguments in facet_wrap(). For example:

ggplot(mpg, aes(x=displ, y=hwy)) + 
  geom_point() + 
  facet_wrap(~ class, nrow=2, ncol=3)

Is it possible to add titles to each facet?

Yes, you can add titles to each facet by using the labeller argument in facet_wrap(). You can create a custom labeling function to achieve this.