On Sep 28, 2009, at 6:36 AM, Lathouri, Maria wrote:
Hi
I would like to display the trendline and the R-square value in a xy
scatter in R. For example if I want to plot f vs g I add the
trendline using the commands below
library(quantreg)
plot(f,g)
abline(rq(g~f))
> plot(f,g)
Error in plot(f, g) : object 'f' not found
> abline(rq(g~f))
Error in eval(expr, envir, enclos) : object 'g' not found
Anyway, there is a worked example in the help page for rq.
however I don't know how to display the R2 in the graph.
Thank you in advance.
Kind regards
Maria
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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