R-alpha: terms

[Thomas Lumley]

Another minor incompatibility
R>attr(terms(y~x),"response")
[1] TRUE
S> attr(terms(y~x),"response")
[1] 1

In S the attribute indicates which column of the model frame will contain
the response. In R this always column 1 because model frames are only
useful when their columns are in the right order (model.matrix doesn't
check).


Thomas Lumley
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