getY
will return the response variable from a model by
summing the fitted values and the response residuals. If link = TRUE
and the model is a GLM, the response is transformed to the link scale. If
this results in undefined values, an estimate based on the 'working'
response variable of the GLM is returned instead (see
glt
).
Any offset variables are subtracted from the response by default. This
means that, for example, rates rather than raw counts will be returned for
poisson GLMs (where applicable).