>Your matrix is almost singular, is badly conditionned,

Mathew, can you explain that..i didn't quite get it..
dn

The condition number is the ratio between the biggest eigenvalue and the lowest one. In your case, it is 10E-16, so the precision of the double numbers. That means that some computations that depend on this ratio (like inversions) can lead to numerical errors. In your case, it is OK, but you should keep in mind this kind of trouble (read what you can on numerical computations ;))

Matthieu
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French PhD student
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