[R] calling plot

[Spencer Graves]

Hi, Jeff et al.:


On 2/8/2016 9:52 PM, Jeff Newmiller wrote:
> plotxy(y1~x1, XY, xlim=c(0, max(XY$x1)))


       Yes, Thanks.


       Is there a way to do this from within "plotxy", so I can call 
"plotxy" as I call "plot"?


       Thanks,
       Spencer


> -- 
> Sent from my phone. Please excuse my brevity.
>
> On February 8, 2016 7:17:57 PM PST, Spencer Graves 
> <spencer.graves at effectivedefense.org> wrote:
>
>     I'm getting an interesting error:
>
>
>         plotxy <- function(x, ...){ 
>
>     +   plot(x, ...)
>     + }
>
>         XY <- data.frame(x1=1:3, y1=4:6) plotxy(y1~x1, XY, xlim=c(0,
>         max(x1))) 
>
>        Show Traceback
>
>        Rerun with Debug
>        Error in eval(expr, envir, enclos) : object 'x1' not found
>
>
>             The following work:
>
>
>     plotxy(y1~x1, XY)
>     plot(y1~x1, XY, xlim=c(0, max(x1)))
>
>
>             Within "plotxy", R can't find "x1" to compute "xlim".  Is there a
>     way I can make x1 available to xlim?
>
>
>             Thanks,
>             Spencer
>
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