[R] 3-way interaction simple slopes

David Winsemius dwinsemius at comcast.net
Sun Nov 7 03:10:32 CET 2010

On Nov 6, 2010, at 9:06 AM, Michael Wood wrote:

> Can anyone show me how to test for significant simple slopes of a 3- 
> way
> interaction, with covariates.

You might start by defining what you mean by "simple slopes" when  
discussing a model with a three way interaction. You might also  
include a description of the variables involved.

> my equation
> tmod<-(glm(PCL~ rank.f + gender.f + MONTHS + CEXPOSE.M + bf.m +
> data=mhatv, family=gaussian ,na.action=na.omit))
> Thank you
> Mike

David Winsemius, MD
West Hartford, CT

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