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
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