Jean-Paul Maalouf wrote:
Do you have any idea on how can I verify preliminary assumptions in
this model (normality of the residuals and variance homogeneity),
since R is not able to extract residuals?
Of course, R extracts residuals. Use the proj() function. See ?proj
for the example
to get the projection of an aovlist object onto the terms of a linear model
proj(npk.aovE)
To get the projections into a simple data.frame, use
tmpE <- proj(npk.aovE)
tmpE.df <- do.call("data.frame", tmpE)
tmpE.df
Mark Difford's solution effectively retrieved columns 3 and 10 from tmpE.df
Rich
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