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debg1
2001 Feb 16
2
bug in step()?
...blem appears to be specific to 1.2.1 (or maybe also
1.2.0?), as the proper behavior was observed in earlier versions. When
I did the same on the surrogate log linear model, everything seemed
okey.
The data involved was the detergent data found in earlier editions of
MASS, as given below,
> detg1
Temp M.user Soft M X
1 Low N Hard 42 68
3 High N Hard 30 42
5 Low Y Hard 52 37
7 High Y Hard 43 24
9 Low N Medium 50 66
11 High N Medium 23 33
13 Low Y Medium 55 47
15 High Y Medium 47 23
17 Low N...