These objects are imported from other packages. Follow the links below to see their documentation.
ggplot(mpg, aes(displ, hwy)) + geom_point(alpha = 0.5, colour = "blue") ggplot(mpg, aes(displ, hwy)) + geom_point(colour = alpha("blue", 0.5))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.