Random generator objects- slight refactor
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Key: MAHOUT-687
URL: https://issues.apache.org/jira/browse/MAHOUT-687
Project: Mahout
Issue Type: Improvement
Reporter: Lance Norskog
Priority: Minor
Problems:
* Uncommons MersenneTwisterRNG, the default RandomUtils.getRandom(), ignores
setSeed without throwing an error.
* The project wants to move off Uncommons anyway.
This patch uses the org.apache.commons.math.random.RandomGenerator classes
instead of org.apache.uncommons.maths.RepeatableRNG classes.
Testcases: All math test cases pass except for
org.apache.mahout.math.stats.LogLikelihoodTest.
Other package tests fail that are mostly about testing random-oriented classes;
not a surprise.
Almost all tests that use random numbers in algorithms still pass; this is a
good sign of their stability.
.
Still, a lot of tests have to be fiddled to make this commit.
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