0/0 is defined as NaN, but non_zero_value / 0 is defined as sign(non_zero_value)*inf
You are not exactly getting Nan where the LoadAlloc is 0: you are getting it for the combinations where both LoadAlloc and Capacity are 0.
You cannot prevent the NaN except by not dividing 0 by 0. For example,
bsxfun(@rdivide,YearAlloc.LoadAlloc.', max(realmin, Gen.Capacity))
... provided that the Capacity is never negative.
The appropriate way to handle this is to use isnan() afterwards to detect the nans and to assign in whatever value you feel is appropriate for division of 0 by 0, whether you feel the result should be -inf or +inf or 0 or 1 (all of which can be justified.)
