[R] add a linear regression line to the plot

[ONKELINX, Thierry]

Such things are very easy with the ggplot2 package

install.packages("ggplot2")
library(ggplot2)
Dataset <- data.frame(A = c(10,20,40,80), B = c(30,40,100,200))
ggplot(data = Dataset, aes(x = A, y = B)) + geom_point() +
geom_smooth(method = "lm")

More info and example on the ggplot2 website: http://had.co.nz/ggplot2/

Best regards,

Thierry

------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie & Kwaliteitszorg
Gaverstraat 4
9500 Geraardsbergen
Belgium

Research Institute for Nature and Forest
team Biometrics & Quality Assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium

tel. + 32 54/436 185
Thierry.Onkelinx op inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
data.
~ John Tukey
  

> -----Oorspronkelijk bericht-----
> Van: r-help-bounces op r-project.org 
> [mailto:r-help-bounces op r-project.org] Namens wangxipei
> Verzonden: donderdag 13 januari 2011 9:35
> Aan: r-help
> Onderwerp: [R] add a linear regression line to the plot
> 
>  
> Dear R users,
>    I am a new R user. My problem is very simple: I want to 
> add a linear regression line to the plot(type="p"), codes are 
> as below:
>  
> x<-c(10,20,40,80)
> y<-c(30,40,100,200)
> plot(x,y,type="p")
> lines(lm(x~y),col="red",lwd=1.5)
>  
> I got only plot without linear line.
> Many thanks ahead for your advice!
> 
> Xipei Wang
> E-mail:wangxipei op gmail.com
> 	[[alternative HTML version deleted]]
> 
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