GitHub user feynmanliang opened a pull request:
https://github.com/apache/spark/pull/8077
[SPARK-9788][MLlib] Fix LDA Binary Compatibility
1. Add âasymmetricDocConcentrationâ and revert docConcentration
changes. If the (internal) doc concentration vector is a single value,
âgetDocConcentration" returns it. If it is a constant vector,
getDocConcentration returns the first item, and fails otherwise.
2. Give `LDAModel.gammaShape` a default value in `LDAModel` concrete class
constructors.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/feynmanliang/spark SPARK-9788
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8077.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #8077
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commit 4cab97207a370ea8f4894fae0ac462ed1f57d640
Author: Feynman Liang <[email protected]>
Date: 2015-08-10T19:44:23Z
Default gammaShape
commit bf4e68561df85fdf8d5482ddd9c34f4ac0605dfc
Author: Feynman Liang <[email protected]>
Date: 2015-08-10T20:38:27Z
Asymmetric docConcentration
commit 9d6a71e884a821e3a1f40825427713559723d0fc
Author: Feynman Liang <[email protected]>
Date: 2015-08-10T20:42:53Z
Add asymmetricAlpha alias
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