labs: Modify axis, legend, and plot labels
Good labels are critical for making your plots accessible to a wider
audience. Ensure the axis and legend labels display the full variable name.
Use the plot
subtitle to explain the main findings.
It's common to use the
caption to provide information about the
ggtitle(label, subtitle = NULL)
A list of new name-value pairs. The name should either be
an aesthetic, or one of "title", "subtitle", or "caption".
The text for the axis, plot title or caption below the plot.
the text for the subtitle for the plot which will be
displayed below the title. Leave
NULL for no subtitle.
You can also set axis and legend labels in the individual scales (using
the first argument, the
name. I recommend doing that if you're
changing other scale options.
p <- ggplot(mtcars, aes(mpg, wt, colour = cyl)) + geom_point()
p + labs(colour = "Cylinders")
p + labs(x = "New x label")
# The plot title appears at the top-left, with the subtitle
# display in smaller text underneath it
p + labs(title = "New plot title")
p + labs(title = "New plot title", subtitle = "A subtitle")
# The caption appears in the bottom-right, and is often used for
# sources, notes or copyright
p + labs(caption = "(based on data from ...)")