[R] Modeling the trend and eliminate it

[Poizot Emmanuel]

Hi,
I would like to eliminate the trend of a set localised (with x an  y) data.
I try to fit a linear model to the data:
mod.01 <- lm(ff~x+y)
I've got so a model. My question is how can I do to subtract the model from 
the initial f data ?

-- 
Cordialement
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Emmanuel POIZOT
Cnam/Intechmer
Digue de Collignon
50110 Tourlaville
Tél : (33)(0)2 33 88 73 42
Fax : (33)(0)2 33 88 73 39
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