[R] logistic regression in R - changing defaults

From: Bob Green <bgreen_at_dyson.brisnet.org.au>
Date: Tue 09 Jan 2007 - 12:16:21 GMT


I was hoping for some advice in changing 2 defaults in a logistic regression.

  1. It looks like the first category is the reference category? In the following syntax 'where' has 4 levels, how can I make the reference category the third category?

model<- glm(cbind(sucesses, failures) ~ where + who + firstep + dxnarrow + age + sex + medyear, family = binomial, data=life.use) model

2. Is it possible to round results to 4 decimal points? If so, what syntax is required?

Any assistance is appreciated,

Bob Green

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