Can anyone illuminate the following for me?
How can I get rid of the blue line in the key in the second plot?
## Create a simple data frame
df=data.frame(x=1:1000, y=2*1:1000+rnorm(1000,sd=1000),
type=sample(letters[1:2],1000, replace=TRUE))
## Very nice! Almost what I want
qplot(x, y, data=df, colour=factor(type)) + geom_smooth()
## Make a nicer plot, with smaller points
## but why does that add the little blue line with a 1?
qplot(x, y, data=df, colour=factor(type), size=1) + geom_smooth()
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