How can I customize ggplot2 plot themes?

What are some ways to customize ggplot2 plot themes?

You can customize ggplot2 themes using functions like theme_minimal(), theme_classic(), or by creating your own with theme().

Can you show me an example of a custom theme?

Sure! Here's a simple custom theme:

custom_theme <- theme(
  panel.background = element_rect(fill = 'lightblue'),
  plot.title = element_text(hjust = 0.5, size = 20),
  axis.text = element_text(size = 12)
)

You can add this to your ggplot object.

How do I apply this custom theme to my plot?

You can apply the custom theme by adding + custom_theme to your ggplot object. For example:

ggplot(data, aes(x, y)) + geom_point() + custom_theme

What if I want to change the colors of the plot?

You can change colors using the scale_color_manual() or scale_fill_manual() functions to specify your desired colors.