Dunnett Test with two different factors in R

Question

I am trying to conduct Dunnett test. I have two different factors: 1) group, 2) condition I can run the code with one factor using this code

Dunnett <- glht(anova_growth,
                  linfct = mcp(group= "Dunnett"))

summary(Dunnett)

However I need to consider both of the factors, I try this code but it is not working:

Dunnett <- glht(anova_growth,
                  linfct = mcp(group*condition = "Dunnett"))

summary(Dunnett)

How can I perform a Dunnett with two factors?

Answer 1

Try this:

Dunnett <- glht(anova_growth,
                linfct = mcp(group= "Dunnett") + mcp(condition = "Dunnett"))
summary(Dunnett)