[MATH-877] Allow category data to be provided as SummaryStatistics in OneWayAnova

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0
• Fix Version/s: 3.2
• Assignee: Unassigned
• Reporter: Phil Steitz
• Created: 09/Oct/12 15:16
• Updated: 07/Apr/13 09:16
• Resolved: 15/Mar/13 13:58

Description

From a post on 9 Oct, 2012 to [e-mail] from Peter Andrews

I have implemented a version of OneWayAnova which uses SummaryStatistics rather than requiring the array of doubles.

I know that there is a whole process for submitting code but I am under a deadline so sending this email with the code is all I am going to do.

A couple of notes:

I would have maintained the same signature structure simply adding methods that supported Collection<SummaryStatistics> but that creates an error because it has the same Signature due to type erasure on Collection<double[]>.

I did not see why certain cases such as having only one array or number of elements < 2 should necessarily throw exceptions – the math still works out and gives reasonable results so given point #1, I differentiated the function signatures by adding a boolean to optionally skip the checks and therefore not not throw DimensionMismatchException.

Minor note: I understand that you cannot change it at this point but there is no reason for this class not to abstract with static methods since it has no state.

Do with this what you will.

Thanks for the wonderful tools you provide.

Peter Andrews