Re: [R] drop1() seems to give unexpected results compare to anova()

Thanks to Mr Dalgaard for his advice and everyone else who has contributed. Inclusion of an error term at the end of sim.set$y = ... line did cure my problems with drop1() and step(). I suppose it is my own inexperience in carrying out simulations caused such gaffe. Thomas

Re: [R] drop1() seems to give unexpected results compare to anova()

from these two functions, but not ones that were so far apart! Now I can use glm() as a workaround, but I just want to make sure there are no bugs in drop1(). Hopefully more people can give their opinions whether there is a bug. Thomas P C Chu

[R] drop1() seems to give unexpected results compare to anova()

running R 2.7.1 on Ubuntu Linux, with all components up to date. Thank you in advance for all your thoughts and replies. Yours sincerely, Thomas P C Chu University of Leicester LE1 7RH UK AOL Email goes Mobile! You can now

Re: [R] drop1() seems to give unexpected results compare to anova()

the suspicion that there could be a bug in drop1() and step(), which I think uses add1() and drop1() repeatedly. Thomas P C Chu AOL Email goes Mobile! You can now read your AOL Emails whilst on the move. Sign up for a free AOL