In the process of addressing tickets for the next release, Charles Harris and I made some changes to the internals of the average function which also affects which input are accepted as valid.
According to the current documentation, weights can either be 1D or any shape that can be broadcasted to a's shape. It seems, though, that the broadcasting was partially broken. After some thought, we are proposing that average only accepts weights that are either - 1D with length equal to a's shape along axis. - the same shape as a. and raises an error otherwise. I think this reduces the risk of unexpected results but wanted to know if anyone disagrees with the change. The proposed version is implemented in revision 4888. Regards, David Huard
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