Peter wrote:
> On Wed, Dec 17, 2008 at 1:00 AM, Marcos Silva <marcosfs2...@gmail.com> wrote:
>> Hello People, it's me again...
>>
>> I tried to use the R's hist() function, using this code:
>>
>> hist = robjects.r['hist']
>> x = robjects.FloatVector(dataset)
>> hist(x)
>> ...
>> But the graphic that I got was very strange...
>> I cannot figure out what is wrong...
>
> By default, R uses the dataset's column names (or something like that)
> which with rpy(2) have probably defaulted to some long string of their
> actual data.
When robjects.FloatVector or other R object constuctors are used, an
"anonymous" R variable is created in the embedded R. The sole
representation of that object is the actual object's structure.
This is what is returned by rpy2.robjects.RObject.r_repr(), and why it
is possible to do things like
robjects.r('hist(%s)' %x.r_repr())
> You'll see lots of strange text (mostly numbers) all
> over your graphs as a result. You will need to explicitly set the
> graph captions, and then everything is fine.
Or bind the R object to a symbol known to R (and most likely in globalEnv).
> Peter
>
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