[R] deleting rows with the same ID if any meet a condition

[François Pinard]

[gblevins]

>If x2 equal 2 then I want to delete all the rows for that person from 
>the dataframe--see Before and After below.

>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

You might try:

  subset(x3, !x1 %in% x1[which(x2==2)])

-- 
François Pinard   http://pinard.progiciels-bpi.ca