[R] abline

[Petr Pikal]

Hi

On 8 Mar 2004 at 9:54, Grace Conlon wrote:

> if I want to specify y-coordinates for the heights of horizontal lines
> to go across a plot.
> 
> x <- c(1,2,3,6,4,8,4,7)
> y <- c(3,2,7,4,5,4,5,6)
> h <- c(3,5,7)
> plot(x,y)
> abline(y=h)
try abline(h=h)

see ?abline

Cheers


> 
> However I got error message:
> Warning message: 
> parameter "y" couldn't be set in high-level plot() function 
> (I tried abline(h=y) , it;s not what I want also)
> 
> Do u know why?
> 
> 
> 
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Petr Pikal
petr.pikal at precheza.cz