Lisa -
Suppose your data frame is called "somedat". Then
do.call(rbind,spl[sapply(spl,function(z)z$result[1] == 0 & z$result[2] == 0 &
sum(z$result) == 1)])
should give you what you want.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Tue, 29 Mar 2011, Lisa wrote:
Dear All,
I have a dataset that looks like this:
group subject result v4 v5
1 1 1 0 1 0
2 1 2 1 0 0
3 1 3 0 0 0
4 1 4 1 0 0
5 2 1 0 1 1
6 2 2 0 0 1
7 2 3 0 1 1
8 3 1 0 1 0
9 3 2 0 0 1
10 3 3 1 0 0
11 3 4 0 1 0
12 4 1 1 0 0
13 4 2 1 1 0
14 4 3 0 0 1
15 4 4 0 0 0
16 4 5 1 0 1
……
I only show 4 groups here. There are several subjects within each group. I
want to select some groups in which for the firs two subjects, the results
are equal to 0, and for the other subjects, only one has the result being
equal to 1. So, for the data above, only the group 3 satisfies these
conditions. Therefore, the new dataset is:
group subject result v4 v5
8 3 1 0 1 0
9 3 2 0 0 1
10 3 3 1 0 0
11 3 4 0 1 0
Can anybody please help how to get this done? Your help would be greatly
appreciated.
Lisa
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