[R] Polygon Graph in lattice/ lattice extra

[Sebastian]

Hi, I'd like to draw a polygon graph. I used the package lattice extra which
includes a function for that (see:
http://latticeextra.r-forge.r-project.org/#panel.xyarea&theme=default). But
i don't want the polygon ending with its filled border at the x-axis (like
in my code). Instead it should be rotated about 90 degrees and end with its
filled border at the y-axis.
I'm pleased about any suggestions or ideas. Thanks, Sebastian
Here's the code:

library(latticeExtra)

data <-
as.data.frame(cbind(c(1,2,3,4,1,2,3,4),c(1,1,1,1,2,2,2,2),c(2,3.8,3,3.5,2.2,4,3.2,3.5)))

x <- data$V1
y <- data$V3
groups <- data$V2

xyplot(y ~ x, data, groups = groups,
       type='l',
       par.settings = simpleTheme(col = c("grey",
rgb(166,27,30,maxColorValue = 255)), lwd = c(5,2)),
       superpose = TRUE,
       panel = panel.superpose,
       panel.groups = function(..., group.number) {
          if (group.number == 1)
          panel.xyarea(...) else panel.xyplot(...)
          panel.grid(h=FALSE, v=-1, col.line="grey")
       },
       auto.key=list(columns=2, space="bottom", cex=0.8, size=1.3, adj=1,
                     between=0.2, between.colums=0.1, points = FALSE,
rectangles = TRUE))
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