I have the following model:
model = aov(y ~ treatment + Age, data = dt)
How I determine
Age as a covariate (covariable) in r? Is there a code or R only knows?
By simply including another variable in your model statement, you've included it as a covariate in your model. So for example, a general model would look like this:
model = model_type(dependent_variable ~ independent_variable + covariate, data = dataset_name),
In the example you provided, you specified an ANOVA
aov) by including
Age on the right side of the tilde (
~). By doing that, you have included it as a covariate when you've included some other variable as your independent variable of interest (in your example, treatment).
Examples are found all over the internet and throughout the r documentation. Try for example