[Rd] residuals.glm for glm(..., y = FALSE)

Achim Zeileis Achim.Zeileis at wu-wien.ac.at
Mon Jul 24 21:16:45 CEST 2006

I just ran into a problem with residuals.glm() for GLMs fitted with
  glm(..., y = FALSE)
For such fits, the residuals of type "deviance", "pearson" and "response"
can't be computed (see example below). The reason is that residuals.glm()
  y <- object$y
which obviously can't work for such fits.

I've checked ?glm and ?residuals.glm and did not find it mentioned
explicitely...looks like a bug to me.


## example for poisson GLM from ?glm
  d.AD <- data.frame(treatment = gl(3,3), outcome = gl(3,1,9),
    counts = c(18,17,15,20,10,20,25,13,12))
  glm.D93 <- glm(counts ~ outcome + treatment, family = poisson,
    data = d.AD, y = FALSE)

## residuals cannot be computed
  residuals(glm.D93, type = "deviance")
  residuals(glm.D93, type = "pearson")
  residuals(glm.D93, type = "response")

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