Re: [R] Comparing three groups, data: present, absent

## Dung observations ## Create a sample original data data <- data.frame(Species=sample(c("W", "G", "R"), 200, replace=TRUE), Age=sample(c("days", "weeks", "months"),200,replace=TRUE), Termites=sample(c(0,1),200,replace=TRUE)) ## Show what original data look like head(data) Spe

[R] Comparing three groups, data: present, absent

Dear R-Experts, Dear friends of dung. I have a statistical Problem, to which nobody I asked could give me an answer. Maybe you can. I was in the African-Savanna and made a Dung-Monitoring. This means I walked randomly over the field and for every Dung-Event I found I noted following parameters