[R] 3-way interaction simple slopes

[David Winsemius]

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 +
> MONTHS*CEXPOSE.M*bf.m,
> data=mhatv, family=gaussian ,na.action=na.omit))
>
> Thank you
> Mike


David Winsemius, MD
West Hartford, CT