id | group | a | b | c |
1 | 1 | 1 | 0 | 1 |
2 | 1 | 0 | 1 | 1 |
3 | 1 | 1 | 0 | 1 |
4 | 2 | 1 | 0 | 0 |
5 | 2 | 1 | 0 | 0 |
6 | 3 | 0 | 1 | 1 |
7 | 3 | 1 | 0 | 1 |
How do I create a variable "c" which takes a value of one only when the "group" includes both a=1 and b=1?
"a" and "b" are binary variables that are mutually exclusive.
Nobuya Fukugawa
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