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From Gilles Sadowski <>
Subject Re: [Math] "LUDecomposition" in "AbstractLeastSquaresOptimizer"
Date Fri, 09 Sep 2011 13:00:22 GMT

On Thu, Sep 08, 2011 at 10:27:00AM -0500, Greg Sterijevski wrote:
> Could you be contaminating the cross product matrix when you do your
> accumulation? I noticed one of the utility classes has methods for doing
> safe accumulations. I know that this was part of the problem when I was
> trying to estimate the Wampler data with the MillerRegression. Just a
> thought...

To make sure, I've tried replacing the "sum" calculation in "getCovariances"
with one using "linearCombination for "MathUtils" but it still fails, so it
seems that the (default) threshold is too small, and I need to be able to
change it.


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