[R] Response Variable Coding

[Abraham Mathew]

Very simple question that I want confirm.

Let's say that I have a response variable. What are the appropriate ways
that it can be coded for a logistic regression model?

1. It can be 0/1 and a factor
2. It can be 1/2 and a factor
3. It can be characters and a factor, where the second letter takes on the
1. (bad/good becomes 0/1).
4. ?
5. ?


My question is....are 1, 2, and 3 all correct, and are there other coding
schemes that glm can take.



Thanks!

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