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negative-sampling issue

Hi, Yasir Mir:

In q3_word2vec.py,

def negSamplingCostAndGradient...
    indices = [target]
    indices.extend(getNegativeSamples(target, dataset, K))
    ...
    sample = outputVectors[indices] #line142
    ...

I think the indices contains the target which is the $u_o$ in the formula.
So the cost and other value are calculated with $u_o$ redundantly.

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