Off-topic, but
"""
However, we don't do L2R at the moment, and it would require new
conventions and examples anyway.
"""
Did anyone read this :
http://fa.bianp.net/blog/2012/learning-to-rank-with-scikit-learn-the-pairwise-transform/
?
2013/6/17 Lars Buitinck <[email protected]>
> 2013/6/17 Olivier Grisel <[email protected]>:
> >> (also, what is query_id?)
> >
> > A integer index for each sample to group the samples into query result
> > sets when doing learning to rank. This can then be used to generate
> > pairs of samples on the fly when doing the pairwise learning to rank
> > reduction.
>
> In pairwise L2R, loss functions are defined on pairs of samples, but
> only for those pairs that pertain to the same query (since ranking is
> done per query). So, you need the query information with the samples.
>
> However, we don't do L2R at the moment, and it would require new
> conventions and examples anyway.
>
> --
> Lars Buitinck
> Scientific programmer, ILPS
> University of Amsterdam
>
>
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