Hi I am using ggplot to overlay two regression lines on a scatter plot each corresponding to a treatment group.
The default plot gives a different slope for each treatment group. However, in some cases i want the lines to be parallel -ie no significant interaction. My code: ggplot(data=df,X,Y,colour=treatment) + geom_point() + geom_smooth(method="lm") I think i use the 'formula' option in geom_smooth but have been unable to find a solution. thanks for any advice. sy -- View this message in context: http://r.789695.n4.nabble.com/ggplot-adding-regression-lines-tp4652906.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
