Message-ID: <da79af331001190818g5ef5cf96wbd1a1f605384e6b9@mail.gmail.com>
Date: 2010-01-19T16:18:47Z
From: Henrique Dallazuanna
Subject: Remove term from formula for predict.lm
In-Reply-To: <128816.22092.qm@web23006.mail.ird.yahoo.com>
Try this;
mod1 <- lm(y ~ u + v + w, data = d)
update(mod1, . ~ . -v)
On Tue, Jan 19, 2010 at 2:10 PM, Werner W. <pensterfuzzer at yahoo.de> wrote:
> Hi,
>
> probably just a quick question: can I somehow change the formula used with predict? E.g., the regression was run on "y ~ u + v + w" but for the prediction the term v should be removed from the formula contained in the regression object and only "y ~ u + w" be used.
>
> I could use model.matrix etc. to do the predictions but it would be very helpful to know a simpler way.
>
> Thanks so much,
> ?Werner
>
>
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--
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O