Thank you very much; that works. Great!
Thomas.
Laurent Gautier wrote:
>2008/2/7, Thomas Walter <[EMAIL PROTECTED]>:
>
>
>>Hi everybody!
>>
>>I am trying to use the R-function princomp (or prcomp, I tried both, but
>>I get the same error anyway) in order to apply principal component
>>analysis to my data.
>>
>>Now, this works fine:
>>
>>let yoyoL be a list of lists :
>>
>>yoyoL = [ [0.0592, 0.0126, 0.08351, 0.01857, 0.02188], [ ... ], ... ]
>>mat = r.matrix(r.unlist(yoyoL), nrow=5, byrow=True)
>>pca = r.princomp(r.t(mat), cor=True)
>>
>>Okay, this works. But if I want to use the predict functionality of
>>princomp, like:
>>pred = r.predict(pca)
>>
>>I obtain the following error:
>>
>>Traceback (most recent call last):
>> File "<stdin>", line 1, in <module>
>>rpy.RException: Error in UseMethod("predict") : no applicable method for
>>"predict"
>>
>>Does anybody know how I could deal with this problem?
>>
>>
>
>This is obviously a workaround but it will keep you going in the meanwhile:
>
>p = r.get("predict.princomp", envir=r.getNamespace("stats"))(pca)
>
>
>
>L.
>
>
>
>
>
>>Thank you very much!
>>
>>Thomas.
>>
>>
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>>
>
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--
-------------------------
Thomas Walter
EMBL Heidelberg
Meyerhofstrasse 1
69117 Heidelberg
Germany
Tel: +49 (0)6221 387-8857
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