Re: [R] Plotting points on line graphs using xYplot in Hmisc

From: Deepayan Sarkar <deepayan.sarkar_at_gmail.com>
Date: Mon, 05 May 2008 12:38:52 -0700

On 5/5/08, John Poulsen <jpoulsen_at_ufl.edu> wrote:
>
>
> Hello,
>
> I am using xYplot to plot lines with confidence bands (see test example
> below). I would like to add a single point with confidence bars to each
> graph (coordinates of the points below: px, py, pxlow, etc...). I tried
> playing with panel=panel.superpose, but failed to get it to work. Any ideas
> on how to add these points to the graphs?

If you want to add the same lines/points in all panels, you could write a not-too-complicated custom panel function; e.g.,

with(dat,

     xYplot(Cbind(ycomb, y.up, y.low)~x1|factor(grp),
            data=dat,type="l",
            method="filled bands",
            col.fill="light grey",
            subscripts = TRUE,
            panel = function(...) {
                panel.xYplot(...)
                panel.segments(pxlow, pylow, pxhi, pyhi)
            },
            scales=
            list(y=list(relation="free"),
                 x=list(alternating=c(1,1,1))),
            ylim=list(c(0,1200),c(0,10000))))

-Deepayan



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