Hi
Yes i had look at this but it doesnt quite do what i am wanting. I do not
want the smoothed line to be coloured, or dependant on a factor or the
default blue.
An example,
library(ggplot2)
df<-data.frame(y=rnorm(100,30,10),x=rnorm(100,20,5),treat=factor(rbinom(100,1,0.5)))
p1<-ggplot(df, aes(x=x, y=y,group=treat)) + theme_bw() +
geom_smooth(aes(linetype=treat),method="lm", se=FALSE,
fullrange=T,size=1)
+
geom_point(aes(shape=treat),size=3) +
scale_shape_manual(values=c(1,16))
p1
The fitted lines are blue - whereas i wish them to be black.
Adding colour="black" into the geom_smooth aesthetic does not change the
line colour to black.
thanks, sy
soon yi wrote
> Hi
>
> I am using geom_smooth to fit linear regression lines over a scatterplot
> for two treatment groups. The default colour for the two lines are blue. I
> have been unable to change this with the usual options. A search online
> has not suggested any solution / work around.
>
> Is there a solution to this?
>
> many thanks, sy
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