On 4/30/2012 3:35, Nasser M. Abbasi wrote:
But you still need to check the cond(). If it is too large, not good. How large and all that, depends on the problem itself. But the rule of thumb, the lower the better. Less than 100 can be good in general, but I really can't give you a fixed number to use, as I am not an expert in this subjects, others who know more about it might have better recommendations.
Alas, there's no fixed number and as if that wasn't enough, there are many condition numbers, each one with different properties. For instance, the Skeel condition number is scale-invariant and it's useful when a matrix is ill-conditioned just because its rows are out of scale.
Kiuhnm -- http://mail.python.org/mailman/listinfo/python-list
