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Subject: Re: Ill conditioned matrix makes linsolve crash
Date: Fri, 30 Oct 2009 09:28:02 +0000 (UTC)
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"Bobby Cheng" <bcheng@mathworks.com> wrote in message <hcdekc$bdc$1@fred.mathworks.com>...
> http://www.mathworks.com/support/bugreports/search_results?search_executed=1&keyword=573283&release_filter=Exists+in&release=168&selected_products=&commit=Search
> 
> See bug report 573283.
> 
Wow, thank you!

Is it possible to reply or ammend to a bug report? (I can only give quality feedback...)

The bugreport tells me:
----
The functions ldl and inv may hang MATLAB when the input matrix meets all of the following criteria:
    * Hermitian
    * ill-conditioned
    * full
    * the eigenvalues cluster around zero.
---
It hangs with ldl and inv too, but the last criterion is not met. A few (5) eigenvalues are in the order of 1, 33 in the order of 100 and 32 are >1e6.

Do I have to file a new bug report?

Sebastiaan