Okay this might not be the best place to post my question, but on the rpy-list i'm getting no response and i'm really stuck with this problem. Perhaps anyone on here has run into the same problem... I'm thinking my newbieness to python probably is one of the reasons why i fail to see what i'm doing wrong...
R is a statistical language and Rpy is the python interface for it. However somehow I'm failing to see a step in the python code with which I address the R language. in R I can do : a=diag(10) #produces an identity matrix of size 10 b=kmeans(a,2,5,10,"Forgy") #calculate a kmeans clustering algorithm on the 10 vectors contained by the matrix just declared. in Ipython this does : --------- In [1]: from rpy import * RHOME= C:\Program Files\R\R-2.4.0 RVERSION= 2.4.0 RVER= 2040 RUSER= C:\Documents and Settings\Ronald Loading the R DLL C:\Program Files\R\R-2.4.0\bin\R.dll .. Done. Loading Rpy version 2040 .. Done. Creating the R object 'r' .. Done In [2]: a = r.diag(10) In [3]: b = r.kmeans(a,2,10,5,"Forgy") --------------------------------------------------------------------------- rpy.RException Traceback (most recent call last) C:\Python24\<ipython console> RException: Error in as.double.default(x) : (list) object cannot be coerced to ' double' --------- I've tried numerous things to get it to work, but i basically can not find out how i do something as simple as the two statements in R in RPython. Apparently something is going wrong somewhere in the conversion of python objects to R objects but i can't seem to fix it. There is a code snippet in the RPy-reference manual but it's only valid for python 2.2 and 2.1 and i couldn't get it to work on 2.4. If anyone has a clue on how to do this or can point me in the right direction, i'd be much oblidged. Kind Regards - Geofram
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