Github user mgaido91 commented on the issue:
https://github.com/apache/spark/pull/19340
thanks for your replt @srowen. I saw it. My feeling is that so far there is
no distance metric definition on `Vectors`. If we add the cosine distance, than
we should add the Euclidean too there. Do you have any suggestion about how to
make this PR going on then?
Thank you.
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