Hi, I regularly need the softmax function (https://en.wikipedia.org/wiki/Softmax_function) for my code. I have a quite efficient pure python implementation (credits to Nolan Conaway). I think it would be a valuable enhancement of the ndarray class. But since it is kind of a specialty function I wanted to ask you if you would consider it to be part of the numpy core (alongside ndarray.max and ndarray.argmax) or rather in scipy (e.g. scipy.stats seems also an appropriate place).
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