[R] graphics - joining repeated measures with a line

[Gabor Grothendieck]

Make each pair of points a separate group using group= and specify
that both points and lines be used via type = "b".  Also set the
symbols in par.settings= so that they are accessed by both
the main plot and the legend:

xyplot(var ~ visit, group = symbols[patient], type = "b",
   auto.key = list(space = "right"),
   par.settings = list(superpose.symbol = list(pch = symbols)))


On 9/6/06, Murray Pung <mcpung at gmail.com> wrote:
> I would like to join repeated measures for patients across two visits using
> a line. The program below uses symbols to represent each patient. Basically,
> I would like to join each pair of symbols.
>
>
>
> library(lattice)
>
> patient <- c(1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9)
> var <-
> c(826,119,168,90,572,323,122,10,42,900,250,180,120,650,400,130,12,33)
> visit <- c(1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2)
> symbols <- c(1,2,3,4,5,6,7,8,9)
>
> xyplot(var ~ visit, pch = symbols[patient], key = list(points = list(pch =
> symbols), space = list("right"),text =
> list(c("1","2","3","4","5","6","7","8","9"))))
>
> # grid.lines(x = visit,y = var,draw = TRUE) ??
>
> I am thinking I may need to use a function that joins coordinates (for
> example join (1,826) with (2,900)), but am hoping there may be a better way.
>
>
>
> Thanks for any help.
>
> Murray
>
>
> --
> Murray Pung
> Statistician, Datapharm Australia Pty Ltd
> 0404 273 283
>
>        [[alternative HTML version deleted]]
>
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