R qplot don't understands 'method' parameter

Question

I'm trying to use the qplot function including the ggplot2 library but when I perform the plot, it warns the next:

qplot(carat, price, data=diamonds, geom=c("point", "smooth"), method="lm")
Warning: Ignoring unknown parameters: method

If watched in a post that it could be cause of library versions, but I haven't got it.

My software versions are:

• RStudio 1.1.383
• R: 3.4.3
• ggplot2: 3.4.3
• mgcv: 3.4.3
• MacOS X 10.12.6 (High Sierra)

Answer 1

If qplot did support the method= parameter, it was in the distant past. Better to just use proper ggplot commands to make your plot.

ggplot(diamonds, aes(carat, price)) + 
  geom_point() + 
  geom_smooth(method="lm")