Dear all,
I note that sum([]) yields 0 instead of []. This is somewhat
contradictory with the documented behavior that [] + n yields []
regardless of the type of n
I allso find that prod([]) yields 1. This is even stranger. The common
feature is that both are the respective neutral element of the operations.
Interestingly, cumsum and cumprod applied to [] yield the expected
result, []
Besides, type([]) is 1 (constant). Somehow it is asuming an empty matrix
is by default a container for constants, even in csses such as the
following:
a = %s
b = a(1:$-1)
where b is an empty sub-vector of a polynomial vector.
None of these behaviors seem to be documented. If intentional, they
should be documented.
Regards,
Federico Miyara
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