[MATH-704] One of Variance.evaluate() methods does not work correctly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2
• Fix Version/s: 3.0

Environment

Java 1.6

• Assignee: Phil Steitz
• Reporter: Leonid Ilyevsky
• Created: 08/Nov/11 23:08
• Updated: 24/Mar/12 16:16
• Resolved: 30/Nov/11 06:25

Description

The method org.apache.commons.math.stat.descriptive.moment.Variance.evaluate(double[] values, double[] weights, double mean, int begin, int length) does not work properly. Looks loke it ignores the length parameter and grabs the whole dataset.
Similar method in Mean class seems to work.
I did not check other methods taking the part of the array; they may have the same problem.

Workaround: I had to shrink my arrays and use the method without the length.