[R] add a linear regression line to the plot

[Eik Vettorazzi]

Hi,
> lines(lm(x~y),col="red",lwd=1.5)
should be

abline(lm(y~x),col="red",lwd=1.5)

hth.

Am 13.01.2011 09:35, schrieb wangxipei:
>  
> 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 at gmail.com
> 	[[alternative HTML version deleted]]
> 
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-- 
Eik Vettorazzi

Department of Medical Biometry and Epidemiology
University Medical Center Hamburg-Eppendorf

Martinistr. 52
20246 Hamburg

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