[R] Strange tick in ggplot geom_area; and ordering, again

[hadley wickham]

Hi Dieter,

It looks like a bug:

Order works fine with bars:
qplot(factor(dur),weight=p,data=cf1, fill=score, geom = "bar", order =
rev(score))

but not with areas:
qplot(dur, p, data=cf1, fill=score, geom = "area", order = rev(score))

I'll add it to my to do list.

Hadley

On Tue, Jan 26, 2010 at 10:05 AM, Dieter Menne
<dieter.menne at menne-biomed.de> wrote:
>
> In the area plots below, I see 4 triangle ticks at both sides of the bar; I
> believe these are non-stacked values for p, but they are definitively
> confusing.
>
> In addition, I would like to get the order of the colors in the plot the
> same as in the legend, and not arranged alphabetically (the factor is
> ordered, don't touch my order). Hadley once mentioned an undocumented
> aestetics "order", but I could not get it to work in the example.
>
> Dieter
>
>
> library(ggplot2)
> cf1 = structure(list(dur = c(10L, 10L, 10L, 10L, 10L, 150L, 150L,
> 150L, 150L, 150L), score = structure(c(3L, 1L, 4L, 5L, 2L, 3L,
> 1L, 4L, 5L, 2L), .Label = c("none", "weak", "moderate", "severe",
> "verysevere"), class = c("ordered", "factor")), p = c(0.04, 0.02,
> 0.26, 0.6, 0.07, 0.07, 0.05, 0.33, 0.42, 0.14)), .Names = c("dur",
> "score", "p"), class = c("cast_df", "data.frame"))
>
> # columns do not ad to 100% because of rounding; never mind
>
> qplot(dur,p,data=cf1, fill=score)+  geom_area()
>
>
> --
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>
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