Hey Andy!

Yep I am using it successfully ;)

The idea with adding epsilon sounds legit. I will try it definitely out.

I think it would be nice if you could add it to your code. Would make it 
also easier to work with sparse matrix.

Regards,
Philipp

> Hi Philipp.
> Great to hear that someone is using that :)
>
> The problem is that the approximation uses a "log".
> Afaik even the exact kernel is not defined if two features are compared
> that are both exactly zeros.
> Usually I just work around that by adding an epsilon.
> I was considering adding that to the code. What do you think?
>
> Cheers,
> Andy



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