R: [R] Grouping binary data

[Vito Muggeo]

Dear Henric,
The following paper deals with goodness-of-fit test for sparse (and even
binary) data:

Kuss O. Global goodness-of-fit tests in logistic regression with sparse
data, Statist Med, 2002, 21:3789-3801.

It should not too hard to write code for some non-standard and (probably
under-used) GoF statistics...

hope this helps you,
best,
vito



----- Original Message -----
From: Henric Nilsson <henric.nilsson at statisticon.se>
To: <r-help at stat.math.ethz.ch>
Sent: Thursday, June 19, 2003 2:35 PM
Subject: [R] Grouping binary data


Dear all,

I'm analyzing a binary outcome using glm() with a binomial distribution and
a logit link, and have now reached the point where I'd like to do some
model checking. Since my data are in binary form I'd like to collapse over
the cross-classification of the factors before the model checking.

Are there any nice and simple ways doing this? If so, how? If not, I'd be
grateful for receiving some hints on how this can be accomplished.

Many thanks,
Henric

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