matlab - Is there a version of bsxfun that works on structure arrays? -

why can this:

a = [1 2]; b = [3 4]; bsxfun(@(ai,bj) ai + bj, a, b') % 4     5 % 5     6 

but not this:

a = struct('x', {1 2}); b = struct('x', {3 4}); bsxfun(@(ai,bj) ai.x + bj.x, a, b'); % error using bsxfun % operands must numeric arrays. 

and replacement function exist works in both cases?

this may not general solution^* particular example easy convert structure array numerical array inside bsxfun, using comma-separated-list generator syntax, , using original anonymous function, i.e.

>> bsxfun(@(ai, bj) ai+bj, [a.x], [b.x]') ans =      4     5      5     6 

and should still leverage computational efficiency conferred bsxfun (as opposed slower "repmat+arrayfun" approach, instance).

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*_{e.g. might not work intended if field contains array instead of scalar, since expansion comma-separated-list different}