Thank you! that worked nicelly!
Laura
2009/3/16 David Winsemius <dwinsem...@comcast.net>:
> grid refers you to abline when"more fine tuning is required", i.e. when the
> situation is not a regular grid.
>
> ?abline
>
> abline(v=286.16, lty="dotted")
>
> If you had a vector, vec, then this should do the trick:
>
> abline(v=vec, lty="dotted")
>
> --
> David Winsemius
> On Mar 16, 2009, at 4:25 PM, Laura Rodriguez Murillo wrote:
>
>> Hi dear all!
>>
>> I wonder if anybody can help me with this:
>>
>> I have a plot:
>> allchr <- read.table("allchrtog.txt", header=F)
>>>
>>> attach(allchr)
>>> names(allchr)
>>
>> [1] "V1" "V2" "V3" "V4"
>>>
>>> plot(V1,V3, type="n")
>>> lines(V1,V3)
>>
>>
>> and I want to add grids to the plot but just at specific x points. So
>> for example, the first would be at 286.16 in the x axis.
>> Does anybody know how can I add these lines?
>>
>> Thank you so much!
>>
>> Laura
>>
>> ______________________________________________
>> 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.
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
>
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