№1 Medic: The code works as I want, but the points (circles) on the plot are too big. How to decrease them? Where to insert (for instance) size = 0.8 for points (circles) on plot?
p1 <- p + geom_point(aes(size = Stage), alpha = 1/3) + xlab ("X") + ylab("Y") + geom_smooth() Stage is factor, x and y - continuous === №2 Rui Barradas: add the scale_size p1 + scale_size_manual(values = 0.8) === №3 Medic: Thanks Rui, but I got: Error: Insufficient values in manual scale. 12 needed but only 1 provided. (or Error: Continuous value supplied to discrete scale) === №4 Rui Barradas: Try nsize <- length(unique(df1$Stage)) before the plot and then p1 + scale_size_manual(values = rep(0.8, nsize)) === №5 Medic: Rui, your example is very good! Now your code works, but not as I want. Why did I use: geom_point(aes(size = Stage)...? In order to receive points of DIFFERENT size! And what does your code do? It assigns the same fixed size to ALL points. I don't need this. I sincerely thank you and closing the topic! ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.