subject:"\[R\] Factor deletion criteria"

Re: [R] Factor deletion criteria

2013-05-04 Thread Greg Snow

In addition to David's great answer also read ?contr.SAS ?contr.treatment ?relevel and also sections 4 and 11.1.1 in An Introduction to R. On Fri, May 3, 2013 at 9:47 PM, David Winsemius wrote: > > On May 3, 2013, at 3:32 PM, Iuri Gavronski wrote: > > > Hi, > > I would like to know the criteri

Re: [R] Factor deletion criteria

2013-05-03 Thread David Winsemius

On May 3, 2013, at 3:32 PM, Iuri Gavronski wrote: > Hi, > I would like to know the criteria by which R removes a factor in linear > models. For example, I have a four level factor, and R creates 3 dummies to > estimate coefficients. Which level is chosen? Can I chance it? The default order is al

[R] Factor deletion criteria

2013-05-03 Thread Iuri Gavronski

Hi, I would like to know the criteria by which R removes a factor in linear models. For example, I have a four level factor, and R creates 3 dummies to estimate coefficients. Which level is chosen? Can I chance it? Thanks, Iuri [[alternative HTML version deleted]]