[SciPy-Dev] SciPy-Dev Digest, Vol 135, Issue 2

[Matt Newville]

Hi Andrew,

leastsq() can be halted by having your objective function return None.  I
think that doesn't work for the scalar minimizers, though I didn't try them
all.

Returning None from the objective function is not very fine-grained (you
wouldn't know why it happened), but it seems easier to have the wrappers
around the Fortran code look for a NULL return value than for a HaltError
exception.   It seems like a sensible, if crude, way to say "Stop now", and
might be worth considering for all the minimizing functions.

--Matt
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