Add optimizations. #13

Merged

joel merged 6 commits from optimizations into master

2019-01-14 19:08:14 +00:00

Author	SHA1	Message	Date
Joel Therrien	e709c42da1	Update the competing risk GroupDifferentiators to make efficient use of the SplitRuleUpdater updates Results in a speed improvement of over 1/3 according to a timing of the TestCompetingRisk#testLogRankSingleGroupDifferentiatorAllCovariates() test	2019-01-11 22:58:56 -08:00
Joel Therrien	86122fd90d	Remove comment that isn't true	2019-01-10 17:34:52 -08:00
Joel Therrien	31d6ce9b3e	Covariates track if they have any NA values, and skip NA handling code if possible	2019-01-10 14:09:43 -08:00
Joel Therrien	a57741b726	Add PMD rules to pom.xml to enforce higher code quality	2019-01-10 11:23:55 -08:00
Joel Therrien	a5fe856857	Massive refactor; Use Iterators/Updaters when calculating difference scores for faster calculations. Changed the covariates to be more clever with how they produce the different splits. In the future (not yet implemented) a clever GroupDifferentiator could update the current score calculation based just on how many rows moved from one hand to the other. There were a few other changes as well; TreeTrainer#growTree now accepts a Random as a parameter which is used throughout the entire growing process. This means it's now theoretically possible to grow trees using a seed, so that results can be fully reproducible.	2019-01-09 21:31:27 -08:00
Joel Therrien	e892076a05	Add a test for the composite log rank splitting rule. Add some debug toString capabilities on Nodes and Trees	2019-01-04 11:22:23 -08:00