[R] help with ggplot backgrounds

[Hadley Wickham]

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Hadley

On Fri, Oct 28, 2011 at 5:03 PM, RanRL <rnrlrn at gmail.com> wrote:
> Hi, I have two questions regarding plotting of this dataset:
>
> Product Color    StoreA StoreB StoreC   Price
>
> A          Red      4          2        3        78
>            Blue      5          2        2       78
>           Greem    4         3         2       80
>
> B          Red       3     ................
>
> And so on (Not all products have same colors).
>
> I made 2 plots: one is a scatter where x=Price and y=Values (of different
> stores). The different stores are facet_wrapped, and Color is indicated by
> point color while Product by point_shape.
> Second plot is a polar plot of geom_bars with position="dodge" for all
> Products to differentiate the colors. The y value is the value for each
> store (Price is not represented).
>
> My questions:
> 1. for the first plot, I want to make a background area split into 3, top
> right is red (indicating high-price/high-values), middle is yellow, the rest
> is green (these are kind of reverse-log areas, like in heat maps).
>
> 2. for the second plot, the red-yellow green are just background geom_rects
> filled in, but I cant figure out how to specify the xmin and xmax for this
> (since they are discrete variables).
>
> Any help will be appreciated, thanks.
>
>
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>
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-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/