This repository contains code that implements a fixed point optimization for Independent Subspace Analysis that was used in 

A. HyvŠrinen and U. Kšster. 
FastISA: A fast fixed-point algorithm for Independent Subspace Analysis 
ESANN2006: 14th European Symposioum on Artificial Neural Networks 

avaliable at http://www.cs.helsinki.fi/u/koster/pubs/ESANN2006-revision.pdf

the ISA code is implemented in Matlab and can be run by calling, for example
fastisa(20,20,10000,4,100,0)
from the Matlab prompt.