Hello R masters,
This request is being made after searching through archive mailing list.
I have a "many" table in a medical application where each injury a person
suffers is recorded as a separate row. In my toy example below it means
respondent #1 had three injuries and so on.
If x2 equal 2 then I want to delete all the rows for that person from the
dataframe--see Before and After below. I have thought about using match to
first identify the IDs that have a 2 in x2 and then in a second step delete all
rows that have matching IDs with this subset, but I have not been able to get
it to work. Any help would be much appreciated.
Before
x1 <- c(1,1,1,2,2,3,3,3)
x2 <- c(2,3,3,1,1,4,4,2)
x3 <- data.frame(x1,x2)
> x3
x1 x2
1 1 2
2 1 3
3 1 3
4 2 1
5 2 1
6 3 4
7 3 4
8 3 2
After
x1 x2
1 2 1
2 2 1
R 2.3.0
Windows XP
Thanks!
Greg Blevins
The Market Solutions Group
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