ggplot: modify coord_cartesian() values dynamically

Question

Is there a way to modify the plot coordinates using coord_cartesian() in a way that is dynamic based on the data in the ggplot call?

For example:

ggplot(cars, aes(x = speed, y = dist)) + 
geom_point() + 
coord_cartesian(xlim = c(min(.$speed), max(.$speed) + 10))

This doesn't work, nor does using .data$speed.

Answer 1

You can use the magrittr and dplyr pipe operator (%>%) to pass data into the ggplot call.

cars %>%
  {ggplot(., aes(speed, dist)) + 
     geom_point() + 
     coord_cartesian(xlim = c(min(.$speed), max(.$speed) + 10))
  }

Note that now you need to explicitly identify the data argument at the beginning of the ggplot call using the . pronoun.