I have the data in dataex below, I just want a table that is number of unique cID by group
so like this (given the dataex below):
Group 1 Group 2 Group 3 Group 4
distinct cID 2 1 2 1

There are many more cID in the data, from using codebook group 2 has 33 distinct cID values in my actual data, but I would prefer to have a convenient way to tabulate this without having to do codebook since there will be many different stratification.
Thanks



Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input float cID long group
1 1
1 3
1 3
1 3
1 3
1 3
1 1
1 3
1 3
1 3
2 4
2 3
2 2
2 2
2 2
2 2
2 3
2 2
2 3
2 2
2 3
2 2
2 2
2 2
2 2
2 3
2 2
2 3
2 2
2 2
2 3
2 2
2 2
2 2
2 2
2 2
2 2
2 3
2 3
2 3
2 4
2 3
2 3
2 3
2 2
2 1
2 2
2 3
2 2
2 3
2 3
2 3
2 3
2 4
2 2
2 2
2 3
2 2
2 2
2 3
2 2
2 2
2 3
2 2
2 3
2 3
2 2
2 2
2 2
2 3
2 3
2 2
2 2
2 3
2 4
2 2
2 2
2 3
2 2
2 2
2 2
2 2
2 3
2 3
2 3
2 2
2 2
2 2
2 2
2 3
2 2
2 2
2 3
2 2
2 1
2 2
2 3
2 2
2 3
2 3
end