StackRating
An Elo-based rating system for Stack Overflow
Home
|
About
|
Stats and Analysis
|
Get a Badge
Answers and rating deltas for
R : Getting the sum of columns in a data.frame group by a certain column
Author
Votes
Δ
Sarunas
6
+4.01
Randy Lai
3
-0.18
jlhoward
2
-0.40
Last visited: Sep 14, 2014, 5:07:29 AM