R help - Sep 2008 - ggplot, getting two scales and one stat.

I have a simple plot:

ggplot(polls, aes(x =Date, y = Popular_Support, colour=Party, shape=Source))
+
stat_smooth(span=0.5) +
geom_point()

How can I get the smooth to only render along one of the scales? ie, I want
to see regressions for each colour, but not each shape.

Right now I get a trendline for each colour and and shape... resulting in an
unreadable mess =D

Thanks!

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On Sat, Sep 27, 2008 at 1:08 AM, Tylere Couture <tylerecouture at
gmail.com> wrote:
> I have a simple plot:
>
> ggplot(polls, aes(x =Date, y = Popular_Support, colour=Party,
shape=Source))
> +
> stat_smooth(span=0.5) +
> geom_point()
>
> How can I get the smooth to only render along one of the scales? ie, I want
> to see regressions for each colour, but not each shape.
Just map shape to source only for the points:

ggplot(polls, aes(x =Date, y = Popular_Support, colour=Party)) +
stat_smooth(span=0.5) +
geom_point(aes(shape=Source))

Hadley

-- 
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