[R] Side by side scatter plots with specified regression lines

[ONKELINX, Thierry]

Dear Sigrid,

This is very easy with the ggplot2 package

install.packages("ggplot2")
library(ggplot2)
ggplot(data = Your.Data.Frame, aes(x = YEAR, y = YIELD, colour = TREATMENT)) + geom_point() + geom_smooth(method = "lm") + facet_wrap(~Country)

Best regards,

Thierry

> -----Oorspronkelijk bericht-----
> Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org]
> Namens Sigrid
> Verzonden: zondag 12 juni 2011 21:47
> Aan: r-help op r-project.org
> Onderwerp: [R] Side by side scatter plots with specified regression lines
> 
> I am new and self taught in R, so please bear with me.
> 
> I want to create two scatter plots side by side. The data set includes
> measurements from two different countries with 7 treatments over a timeline
> (x-axis).
> 
> Problem 1
> I want to have each plot to include the data from one of the countries with
> 7 regression lines of the treatments, but I do no know how to divide the data
> between them. This is how I created one plot with all the data.
> 
> > plot(YEAR,YIELD,col="red",xlab="Year",ylab="Yield",xlim=c(1,4),ylim=c(
> > 1,150))
> 
> Problem 2
> The models I've found to describe the regression lines of the treatments seems
> to be different than the default ablines that R creates. I have the values of the
> exact values of intercepts and slopes, but does not know how to add them to
> the graph. This is what I got so far.
> 
> > abline(lm(YIELD[TREATMENT=="A"]~YEAR[TREATMENT=="A"]),lty=2,col="1")
> 
> I hope this is enough to give me some pointers, otherwise I will try to elaborate.
> 
> Thank you for your help.
> 
> --
> View this message in context: http://r.789695.n4.nabble.com/Side-by-side-
> scatter-plots-with-specified-regression-lines-tp3592473p3592473.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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