I have been looking at continuing the work on the descriptive module to add the remaining stats found in Commons Math. Before adding more classes I would like to address the current implementation pattern.
The statistics in the descriptive module are currently abstract classes with a concrete inner class that is prefixed Storeless. This pattern would make sense if there was the intention to provide stored implementations. Currently I do not think this would be the best solution. For example it would make sense to separate the storage of a variable size stream of double values, from the computation of a statistic. That is, a resizable backing array storage is out of scope for this module. I propose to simplify the current implementations to final classes that implement the current Storeless functionality. Any future change to stored, immutable, or other implementations can be provided by changing the final class back to abstract with different implementations. Alex --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
