| twofactors {drc} | R Documentation |
The dataset consists of several dose response curves for each combination of two factors that possibly influence the dose-response relationship.
data(twofactors)
A data frame with 288 observations on the following 4 variables.
date02-05-2005 20-04-2005 25-04-2005treatmentyes noconclengthIt turns out that the two factors only need to enter the model for the parameter e, in an additive way.
Artificial data
model1 <- multdrc(length ~ conc,
date:treatment,
data = twofactors, fct = l3(),
collapse =
list(~date:treatment-1, ~date:treatment-1,
~date:treatment-1),
na.action=na.omit)
summary(model1)
rm(model1)