Add a legend in two geom_points-CodePudding

I want to add the legend next to my plot in order to be able to show which color is explaining each variable. How can I do that? Here's my code:

scatter = ggplot(vehicles, aes(x = seq(1,108)))  
  geom_point(aes(y = RV),size = 2,color = "blue" )   
  geom_point(aes(y= BOP), size = 2, color = "red")   
scatter

I just obtained my plot but without the names in it

CodePudding user response：

It would be clearer if you can provide the vehicles data as well but I'm guessing this would work:

scatter = ggplot(vehicles, aes(x = seq(1,108)))  
  geom_point(aes(y = RV, colour = "RV"),size = 2 )   
  geom_point(aes(y= BOP, colour = "BOP"), size = 2)   
scatter