Re: [R] How to align group based on the common values of two columns in r

e - From: Tammy Ma To: "r-help@r-project.org" Cc: Sent: Tuesday, January 22, 2013 4:28 AM Subject: [R] How to align group based on the common values of two columns in r HI, I met this problem: I have the feature data frame:   Feature    OS     4              2     4 

Re: [R] How to align group based on the common values of two columns in r

42 #2   4  1    41 #3   4  3    43 #4   1  2    12 #5   4  1    41 A.K. - Original Message - From: Tammy Ma To: "r-help@r-project.org" Cc: Sent: Tuesday, January 22, 2013 4:28 AM Subject: [R] How to align group based on the common values of two columns in r

[R] How to align group based on the common values of two columns in r

HI, I met this problem: I have the feature data frame: Feature OS 4 2 4 1 4 3 1 2 4 1 what I want to do is to autimatically create one more column called "group": Feature OS Group