[MAHOUT-797] MapReduce SSVD: provide alternative B-pipeline per B=R' ^{-1} Y'A

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.5, 0.6
• Assignee: Dmitriy Lyubimov
• Reporter: Dmitriy Lyubimov
• Created: 29/Aug/11 15:31
• Updated: 08/Mar/14 12:06
• Resolved: 10/Jul/13 17:45

Description

Since alternative flow using Cholesky decomposition is extremely easy to add to existing computations of BB', I am thinking of just adding an option that chooses between B-pipeline with QR step and B-pipeline with Y'Y-Cholesky step.

Ongoing work and some initial code (Y'Y step) is here https://github.com/dlyubimov/mahout-commits/tree/MAHOUT-797.

I also want to fix what's left unfixed in MAHOUT-638.

Issue Links

• depends upon: MAHOUT-792 Add new stochastic decomposition code
• depends upon: MAHOUT-790 Redundancy in Matrix API, view or get?