I have not tried anything like that but have a look at www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CDkQFjAC&url=http%3A%2F%2Fstackoverflow.com%2Fquestions%2F7476022%2Fgeom-point-and-geom-line-for-multiple-datasets-on-same-graph-in-ggplot2&ei=MfHzUej7FoSergG1_ICYAw&usg=AFQjCNH2b72a6un_xAM-PYxC-sUGU8-xOw&sig2=iBIrl1uhIsJXmPbAh4kUbw&bvm=bv.49784469,d.aWM
You may be able to use two smooth statements to do what you want. John Kane Kingston ON Canada > -----Original Message----- > From: ye...@lbl.gov > Sent: Fri, 26 Jul 2013 12:21:23 -0700 > To: r-help@r-project.org > Subject: [R] add different regression lines for groups on ggplot > > Hey All, > > I need to apply different regression lines to different group on my > ggplot, > and here is the code I use: > > qplot(x=Var1,y=Var2,data=df,color=SiteID,group=SiteID)+geom_point()+geom_smooth(method='lm',formula=log(y)~I(1/x),se=FALSE,size=2) > > However the regression for different groups is as below: > > AL1/AL2: log(y)~I(1/x) > AL3: log(y)~log(x) > > How can I apply each regression equation on the same ggplot? > > Also I have an issue that if I use the code above, the regression lines > are > not overlapped on top of my data points. > > Thanks for your help! > ______________________________________________ > 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. ____________________________________________________________ TRY FREE IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if5 Capture screenshots, upload images, edit and send them to your friends through IMs, post on Twitter®, Facebook®, MySpace™, LinkedIn® – FAST! ______________________________________________ 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.
