Ok so crashing is always bad. What I should have said is that I think errors are bad in almost all cases as well. The norm returning zero seems sensible to me so perhaps inversions and such should raise exceptions.
I would much prefer no errors were raised except where necessary. Like I said I tend to find that if I write code that handles the non-empty case naturally then I don't have to change it to do something sensible for the empty boundary case. John. _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
