Faisal Moledina wrote:
> Laurent,
>
> On Sun, Nov 29, 2009 at 4:13 AM, Laurent Gautier <lgaut...@gmail.com> wrote:
>> That's more an issue with ggplot2 than with rpy2.
>> What I meant earlier is the following:
>>
>> pp += ggplot2.geom_line(ggplot2.aes_string(x='z',y='dens'),
>> data=datafline)
>>
>>
>> It is working here (rpy2-2.1dev -- note: your code revealed a bug with
>> rpy2.robjects, so you might need a very recent update from the repository).
>
> That seem to have been the issue.
May be not. The bug I am referring was an unfortunate infinite recursion
during robjects-level object mapping.
The error messages you reported suggest more that the aes must be the
first (unnamed) argument to a geom_* function (which the code above shows).
> By upgrading to the most recent
> update in the repository, I have been able to plot both the histogram
> and the line, each from a different dataset. As a side note, it
> appears that ggplot2.aes_string is now ggplot2.aes, which is the way
> it is in R.
The other way around.
rpy2's ggplot.aes used to in fact call R's ggplot2::aes_string. It first
seemed like a good idea but made some call impossible (and this changed
at least 2 months ago, I think)
> Next problem: Because I included the option y='..density..' in my
> histogram aes, my plot now has ..density.. as its x label. This
> doesn't happen in R. I thought I could rectify this by adding the line
> pp=pp+ggplot2.opts(xlab="z"), but that doesn't seem to work. If I
> remove the option y='..density..' from my histogram aes, I get z as my
> x label, but I still cannot change it using the options (e.g.
> pp=pp+ggplot2.opts(xlab="z position") has no effect). Any thoughts?
This is a gpplot2 question, not an rpy2 one, I think (which I can't be
all answering in good conscience when there is both documentation on the
ggplot2 website, as well as a recent book available).
From memory, the call should be pp = pp + ggplot2.scale_x_continous("z
position")
L.
> Faisal
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