[MATH-723] BitStreamGenerators (MersenneTwister, Well generators) do not clear normal deviate cache on setSeed

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0, 2.1, 2.2
• Fix Version/s: 3.0
• Assignee: Phil Steitz
• Reporter: Phil Steitz
• Created: 11/Dec/11 21:03
• Updated: 24/Mar/12 16:16
• Resolved: 11/Dec/11 21:59

Description

The BitStream generators generate normal deviates (for nextGaussian) in pairs, caching the last value generated. When reseeded, the cache should be cleared; otherwise seeding two generators with the same value is not guaranteed to generate the same sequence.