On 04/05/2011 11:36 AM, Luca Beltrame wrote:
> Hello,
>
> I'm trying to find a way to replace columns in matrices and data frames. For
> a
> data frame, the equivalent in R would be:
>
> mydataf$Column <- some_vector
>
> How can this be done from rpy2 (2.1.9), given that rx2() is a function and
> thus can't be used for assignments?
>
> Thanks in advance.
Hi,
the only way I've managed so far was to make the dataframe known in the
R environment and then do the operation through R code directly. I used
it for sorting, or re-ordering a column but it's pretty much the same
operation.
rpy2.robjects.globalenv["mydataf"] = mydataf
rpy2.robjects.globalenv["some_vector"] = some_vector
rpy2.robjects.r("mydataf$Column <- some_vector")
I'm almost convinced there must be a better way but I haven't found one yet.
Good luck and let me know if you find something,
Moritz
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