Week 4 OPR

[Nathan Streeter]

Originally Posted by lineskier

OPR is standard matrix algebra and is a published mathematical formula, so when I see different OPRs it makes me a bit nervous. OPRnet may be taking across multiple event's rather than latest events, which would be cause for different values.

Yes, it is disconcerting if people are getting different OPR numbers... But that really isn't the case: Ed's and Bongle's OPR's do match up for each robot for each tournament. The reason why Ed's OPR *World Rank* numbers are different than taking the highest OPR from each team is because it solves a single world-wide matrix. This is great in many ways, but has the (single?) downside of solving for a single OPR from their Week 1 performance to their Championship performance, which is somewhat flawed. That said, I'm not sure what'd be a better way... :-/

Lineskier (Mike?), would it be possible to use the matrices to compute the EMC and ERC? I really like that EMC and ERC use the twitter feeds to break down a Robot's contribution into Minibot and Hostbot, but without the matrices, they just don't have the same accuracy.

Thanks, EagleEngineer for pointing out the typo, I'll try to fix that!