Thursday, April 10, 2014

The non-ultimative Plus Minus comparison

for all two of you that haven't enough of it yet:
There is a great article on different types of adjusted Plus Minus over at Hickory High (great name by the way :) ). This allows me to keep my number of words to a minimum (I can hear your relieve...).
Instead I'll just quickly show some comparing plots between ESPN's Real Plus Minus (RPM on the x-axis) and GotBuckets @talkingpractice (more great names) regularized adjusted Plus Minus (RAPM on the y-axis).
My takes on it: Even though they are similar (as expected, because they are based on the same measurement), we can still see that they have some spread. This tells us that you should never start arguing that player A is better than player B if there PM differs by less than three points (more or less). Also, RPM generally gives a higher impact to single players. Feel free to get really angry at one or both of the two stats because they got something completely wrong ('How is Marc Gasol so bad in offensive Plus Minus!? This doesn't make any sense!'). I'll now show in the following order:
1. correlation between RPM and RAPM for all 425 players I had available.
2. RPM vs RAPM for players that played more than 41 games and 28 minutes per game
3. the same for the offense
4. the same for the defense

(as always, click on the figures for larger versions. I guess that here it's really necessary)

Sorry for not having a better layout. I promise I'm going to work on it. (By the way, if somebody wants to have the app that I wrote to produce these figures - you're welcome!). Let me know if you can find any interesting trends, because here it's midnight and I'll go to bed.
Have a nice night (or day, depending on where you are),

Data file (data from &


  1. It would be great to have a table as well as the charts. I can't blow the charts up enough for my comfortable use.