lm1 <- lm(y~x, data=mydata, subset=mydata$patchchoice==1) lm2 <- lm(y~x, data=mydata, subset=mydata$patchchoice==2)
abline(lm1, col="Blue") abline(lm2, col="Red" ) Should do it. Not likely the best way but a way. Andy. andydol...@gmail.com On 7 April 2010 19:17, Samantha Reynolds <sam.m.reyno...@hotmail.com> wrote: > Hello > > I am trying to plot two lines of best fit on a scatter plot. > > I'm plotting number of visits (y) against personality (x), half the plots > are blue for patchchoice one and the other plots are red for patchchoice > two (these options come from one factor, see below) . So i need a line for > the patch ones and another line for the patch twos. How would i go about > doing this? I know i may need to use the subset command, but I'm not > entirely sure how to do this as I am relatively new to R > > example of data > birdid timetaken numvisits ptachchoice time bold > 1087 8 10 1 AM 0 > 1087 28 6 1 PM 0 > 1087 13 3 2 AM 0 > 1087 121 0 2 PM 0 > 1046 121 0 1 AM 1 > 1046 121 0 1 PM 1 > > > Thanks > > Sam > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
