Hi,
I have longitudinal school suspension data on students. I would like to
figure out how many students (id_r) have no suspensions (sus), i.e. have a
code of '0'. My data is in long format and the first 20 records look like
the following:
> suslm[1:20,c(1,7)]
id_r sus
11 0
15 10
16 0
18 0
19 0
19 0
20 0
21 0
21 0
22 0
24 0
24 0
25 3
26 0
26 0
30 0
30 0
31 0
32 0
33 0
Each id_r is unique and I'd like to know the number of id_r that have a 0
for sus not the total number of 0. Does that make sense?
Thanks!
Chris
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