My guess is that there are two ways that you might explore to do this.
1. Any time someone says 'statistics', my first thought is 'R'; I
don't know any of the things you're talking about here, but if these
are statistical methods of some sort, R seems like a valid place to
start looking.
http://cran.r-project.org/web/packages/rgdal/index.html
rgdal will let you read OGR data sources (like PostGIS databases)
into a spatial vector object, and interact with them from there.
There's also PL/R to access R within PostgreSQL, in case no one else
mentioned it.
HTH,
Yves
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