Re: [R] ggplot2: deterministic position_jitter & geom_line with position_jitter

From: meow9th <y.yuan_at_gmx.com>
Date: Thu, 24 Jun 2010 19:06:43 -0700 (PDT)

I'm having the same problem as Stephan (see below), but what I'm trying to jitter is not a numeric vector, but a factor. How do I proceed? (Naively jittering a factor makes it numeric, no longer factor, so I don't get the custom ordering which conveniently comes with using a factor. I'm not sure how I would simulate that custom ordering with the jittered vector ... I couldn't find anything online about jittering factors, but maybe I just wasn't searching cleverly enough.)

Incidentally, the reason I need to synchronize jittering, so to speak, is because I am using two geom_points to create the effect of a filled circle with a solid outline but a transparent fill. E.g., ggplot(data, aes(x_factor, y_numeric)) + geom_point(shape = 21) + geom_point(alpha = 0.5)

Is there a more elegant way to accomplish this goal, or is using two geom_points the way I'm supposed to do it?

hadley wickham wrote:
>
> On Sat, Sep 12, 2009 at 1:34 PM, Stephan Kolassa <Stephan.Kolassa_at_gmx.de>
> wrote:

>> Dear guRus,
>>
>> I am starting to work with the ggplot2 package and have two very dumb
>> questions:
>>
>> 1) deterministic position_jitter - the jittering is stochastic; is there
>> any
>> way to get a deterministic jittering? For instance:

>
> Yes. The plyr package generally makes this sort of manipulation pain
> free.
>
>> 2) geom_line with position_jitter - when I call multiple geoms with
>> position_jitter, each geom gets its own jittering. For example
>> (continuing

>
> Again, you'll have to adding the jittering yourself.
>
> Hadley
>
> --
> http://had.co.nz/
>
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Received on Fri 25 Jun 2010 - 04:32:22 GMT

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