Hi Pavan.
I meant robust to outliers. But I guess that is encoded in the merging 
strategy.
I didn't know about the book. Is it any good / recent?

Cheers,
Andy

On 03/04/2013 09:20 PM, Pavan Mallapragada wrote:
> Thanks Andreas.
>
> I will be implementing them for my own work anyway, and will add the 
> necessary stuff required to pass the quality standards and send it around for 
> approval. I am not sure how long it will take, but was asking this to align 
> myself with the requirements while working on my stuff.
>
> In any case, if you think it is useful (with any necessary revisions), you 
> can pull it in. No worries otherwise.
>
> When you said robust did you mean it in the robust-statistics sense (say, 
> noise tolerant version) or just a definitive algorithm? The algorithm itself 
> is pretty well defined (say the classical one from Hartigain's book, or SLINK 
> with Sibson's improvements) , with similarity metrics and merging strategies 
> passed as the input, along with the data.
>
> Best,
> Pavan
>
> On Mar 4, 2013, at 2:00 PM, Andreas Mueller <amuel...@ais.uni-bonn.de> wrote:
>
>> Hi Pavan.
>> There are no hierarchical algorithms beside WARD.
>> It would indeed be great to have single-link and complete link.
>> Is there any robust version of single-link btw? What description would
>> you go by?
>>
>> As always, the disclaimer: Getting a new algorithm into scikit-learn is
>> a bit more than
>> writing down the algorithm. You need to provide tests and documentation
>> and need
>> to respect our coding guidelines. So that usually involves a bit of work.
>>
>> On the other hand, having this classical algorithms in sklearn would
>> definitely be great!
>>
>> Cheers,
>> Andy
>>
>>
>> On 03/04/2013 08:46 PM, Pavan Mallapragada wrote:
>>> Hi,
>>>
>>> I am trying to find the single link / complete link algorithms in 
>>> scikit-learn. I see Ward's is the only hierarchical clustering algorithm 
>>> implemented (from the documentation).
>>>
>>> I did find other extensions of scipy implementing these, e.g. hcluster 
>>> (http://code.google.com/p/scipy-cluster/).
>>>
>>> I am willing to contribute by adding the implementations of other 
>>> hierarchical clustering algorithms. I am emailing to check if I am missing 
>>> something before trying to add my implementations.
>>>
>>> Thanks,
>>> Pavan
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