[R] vertical lines in R plot

[PIKAL Petr]

Hi

?segments
segments(x0=c(5.0,5.5,6), y0=c(0,0,0), y1=c(0.12,0.60,0.20))

Regards
Petr


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Naser Jamil
> Sent: Monday, March 11, 2013 3:10 PM
> To: R help
> Subject: [R] vertical lines in R plot
> 
> Dear All,
> May I seek your suggestion on a simple issue. I want to draw vertical
> lines at some positions in the following R plot. To be more specific, I
> wish to draw vertical lines at d=c(5.0,5.5,6) and they should go till
> p=c(0.12,0.60,0.20) .  I haven't  found any way out, though made
> several attempts. Please run the following commands first if you are
> interested in!
> 
> #######################################################
> 
> psi1<-function(alpha1,beta1,alpha2,beta2,d){
> exp(alpha1+beta1*d)/((1+exp(alpha1+beta1*d))*(1+exp(alpha2+beta2*d)))
>                                            }
> alpha1<--3.5
> beta1<-1
> alpha2<--6
> beta2<-0.72
> 
> d<-seq(0.5,10,0.01)
> plot(d,psi1(alpha1,beta1,alpha2,beta2,d),type="l",pch=18, ylim=c(0,1),
> xlab="Dose", ylab="Probabilitty")
> 
> ##########################################################
> 
> 
> Many thanks for the help!
> 
> Regards,
> Jamil.
> 
> 	[[alternative HTML version deleted]]
> 
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