support for non-median quantile functions?

Hi, would it be possible to expand the median() function to be expanded work on any quantile? Martin's original request did say quantile, not just median :D http://osdir.com/ml/db.monetdb.bugs/2008-06/msg00206.html

Given the MonetDB.R connection, I think a lot more statisticians are going to be using MonetDB -- and they'll find a lot of value in being able to calculate statistics like the 25th and 75th, percentiles quickly.

I can submit a bugs.monetdb.org report if that's appropriate?

Thanks for considering this!!