Hello,
Sorry for the late reply. I wouldn't worry about the box3d failure -
the failure seems to occur only for the LM+accel algorithm and only when
using finite differences to compute the directional derivative vector. I
know from some experience that finite differences don't work very well
to calculate that vector, so in some sense this is a known problem. I
will log this into the bug tracker so I can take a look when I find some
more time, and possibly contact the original author of that algorithm to
see what he thinks.
But you can sleep well - there are around 41 different test problems
for that module, which thoroughly test the various algorithms. I guess
if you're really worried then if you use the LM+accel algorithm, be sure
to use an analytic expression for the directional derivative vector.
Thanks,
Patrick
On 02/20/2017 09:03 AM, Adam Majer wrote:
On 02/11/2017 07:11 PM, Patrick Alken wrote:
Also for the multifit_nlinear box3d failure, I am aware of this problem
- it also fails on an old macOS system I have. I currently don't have a
fix for it, but it seems that recent compilers don't have an issue
How recent? This is using GCC 6.3.1
- Adam
