Hi Chengxuan Wan,

Without more details and a code example, it’s difficult
to help you. Furthermore, it’s better to ask for help
on the scikit-learn mailing list or on stack overflow.

Best regards,
Arnaud Joly


On 25 Apr 2014, at 19:04, Chengxuan Wang <cw1...@nyu.edu> wrote:

> Hi, Arnaud Joly,
> 
> Sorry for disturb. 
> 
> These days I use sklearn's knn regressor. when I use distance as weights. 
> There is Nan happen. 
> before that , i do scale. So I am wondering you didn't do the situation that 
> there are two points has distance with zero.
> Am I right? I am not sure. 
> 
> sorry for disturb.
> Chengxuan Wang
> 


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