lm in R [🇷 for BE/BA]

posted by Helmut Homepage – Vienna, Austria, 2008-09-26 02:23 (6465 d 11:54 ago) – Posting: # 2416
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Dear ElMaestro!

❝ Actually, I do not know of the "|" to specify nesting.

❝ I used "Subj%in%Seq"


I don’t know both notations. See the documentation of lm under 'Details':

Details
Models for lm are specified symbolically. A typical model has the form response ~ terms where response is the (numeric) response vector and terms is a series of terms which specifies a linear predictor for response. A terms specification of the form first + second indicates all the terms in first together with all the terms in second with duplicates removed. A specification of the form first:second indicates the set of terms obtained by taking the interactions of all terms in first with all terms in second. The specification first*second indicates the cross of first and second. This is the same as first + second + first:second.
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