On Mon, 28-Jan-2013 at 12:21PM +1300, Paul Murrell wrote:
|> Hi
|>
|> On 17/01/13 13:19, p_conno...@slingshot.co.nz wrote:
|> >Paul Murell's article "What's in a Name" in The R Journal Vol 4/2
|> >gives an interesting example of editing a stacked barplot of the barley
|> >data. Using the method described in that article, it's easy to do
|> >something along the lines of
|> >
|> >grid.edit("plot_01.border.strip.1",
|> > grep=TRUE, global=TRUE,
|> > gp=gpar(col = "red"))
|> >
|> >That changes more than I'd like to change. I'd like to change only the
|> >bottom line of the rectangle. How would I overwrite the unwanted red
|> >lines along the lines of what box() would do with base graphics?
|>
|> You cannot modify just part of a basic shape (e.g., just the bottom
|> line of a rectangle). One way to do what I think you want is to
|> specify a custom strip function that draws an extra line over the
|> top of the existing rectangle, like this ...
|>
|> library(lattice)
|> library(grid)
|> barchart(yield ~ variety | site, data = barley,
|> groups = year, layout = c(1,6),
|> stack = TRUE,
|> ylab = "Barley Yield (bushels/acre)",
|> scales = list(x = list(rot = 45)),
|> strip = function(...) {
|> strip.default(...)
|> grid.segments(0, 0, 1, 0, gp=gpar(lwd=1.5, col="red"))
|> })
|>
|> Is that the sort of effect you want?
I didn't really want thick red lines, but now that I know how to use
grid.segments, I can do what I need.
Thanks
--
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.
___ Patrick Connolly
{~._.~} Great minds discuss ideas
_( Y )_ Average minds discuss events
(:_~*~_:) Small minds discuss people
(_)-(_) ..... Eleanor Roosevelt
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