Hello,
The package limma fas this function. Dorthe may be getting NA's or 
negative numbers which she is taking square root of. Please check if 
this is the case.
regards,
Shripad

Herve Pages wrote:
> Hi Dorthe,
>
> There are more than 200 packages in Bioconductor. None of them has a
> dulicateCorrelation function. Maybe you are referring to the
> duplicateCorrelation function from the limma package?
> Hopefully, a limma expert will be able to help you.
>
> Note that it would help a lot if you could provide the output of sessionInfo(),
> and if possible, a few lines of code that show how to reproduce the problem.
>
> Thanks!
> H.
>
> dorthe.belgardt@medisin.uio.no wrote:
>   
>> Hi,
>>
>> when using the dulicateCorrelation function I get the following warning
>> message: "NaNs produced in: sqrt(dfitted.values)"
>> I have used the function before and usually got the "too much damping"
>> warning message, which I know can be ignored. But now I get the warning
>> message metioned above and don't know whether to ignore it or not.
>>
>> Thanks for any help in advance,
>> Dorthe
>>
>>     
>
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>
>
>   

-- 
Shripad Sinari
Computer Database Specialist
Bioinformatics Shared Service
Arizona Cancer Center
Tucson, Arizona, 85725-5024


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