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From Dimitri Pourbaix <pourb...@astro.ulb.ac.be>
Subject Re: [MATH] Comment on MATH-352
Date Wed, 10 Mar 2010 21:17:37 GMT
Luc,

> So I would suggest to put a customizable threshold with a default value
> of MathUtils.SAFE_MIN and a setQRRankingThreshold(double threshold)
> method. This will preserve compatibility. With this setting, one could
> check all existing tests should pass. The solution proposed by the
> reporter does not work on all cases because the threshold is far too
> high for the ill-conditioned problems in the minpack tests. In fact, any
> threshold greater than 1.0e-66 leads to some tests failing.
>
> We should also use setQRRankingThreshold with more lenient settings to
> check we either don't find the optimum or completely fail depending on
> the rank we (badly) compute.
>
> Do you want to take care of this issue ?

Yes, I will work on that next week.

Dim.
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