Thank you guys. It was really worthy!

On 11 March 2013 16:10, William Dunlap <wdunlap@tibco.com> wrote:

> Also, type="h", in plot(), points(), or lines() draws vertical line
> segments between (x,y)
> and (x,0).  E.g.,
>      points(x=c(5.0,5.5,6), y=c(0.12,0.60,0.20), type="h")
> does the same as
>    segments(x0=c(5.0,5.5,6), y0=c(0,0,0), x1=c(5.0,5.5,6),
> y1=c(0.12,0.60,0.20))
>
> Bill Dunlap
> Spotfire, TIBCO Software
> wdunlap tibco.com
>
>
> > -----Original Message-----
> > From: r-help-bounces@r-project.org [mailto:r-help-bounces@r-project.org]
> On Behalf
> > Of Sarah Goslee
> > Sent: Monday, March 11, 2013 8:49 AM
> > To: Naser Jamil
> > Cc: R help
> > Subject: Re: [R] vertical lines in R plot
> >
> > Like this:
> >
> > segments(x0=c(5.0,5.5,6), y0=c(0,0,0), x1=c(5.0,5.5,6),
> y1=c(0.12,0.60,0.20))
> >
> > If you wanted them to extend the entire height of the plot,
> > abline(v=c(5.0,5.5,6))
> > is simpler.
> >
> > Thanks for the reproducible example,
> > Sarah
> >
> > On Mon, Mar 11, 2013 at 10:10 AM, Naser Jamil <jamilnaser79@gmail.com>
> wrote:
> > > 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.
> > >
> >
> > --
> > Sarah Goslee
> > http://www.functionaldiversity.org
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>

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