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Ran 18 Mar 2018 12:27PM UTC

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Committed 18 Mar 2018 12:23PM UTC coverage: 81.175% (+0.2%) from 80.989%

Job # 900.1

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push

travis-ci

Committed by

web-flow

Commit Message

Fix tSNE bugs injected by numpy 1.13  (#333)

Fixes #323 that was reported on StackOverflow: a change in the way matrix comparisons are handled in Numpy 1.13 caused our visualizer to break. 

To fix this, I changed vector existence comparisons to `is None` to explicitly query them, 
though this will not protect against empty vectors. 

I also added several new test cases and image comparisons, but to do that I needed to add a `random_state` to the visualizer to ensure that all stochastic components behaved as expected. Python `set` objects are randomly hashed, so I changed to using `np.unique`. This caused us to have to remove the class filtering feature of tSNE, but it is more robust. 

Another note: the tests also use PY3 vs PY2 tolerances to improve Travis testing.

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