Jennifer Hou wrote:
Thank you very much for your kind reply, I have found that the error
was in the stdCoeff function and not in the linear model. summary()
works pretty well on my model, I will simply use another function to
compute my coefficients. Best regards, Jennifer
See ?coef , summary should also give them to you.
Date: Wed, 4 Aug 2010 15:27:40 -0500 From: er...@ccbr.umn.edu To:
jennifer....@hotmail.de CC: r-help@r-project.org Subject: Re: [R]
regression analysis with interactions
Jennifer Hou wrote:
Hello,
I have got a linear model that looks like this: lm(criterion ~
variable.A*variable.a + variable.B*variable.b + variable.C
*variable.c)
The output computed with stdCoeff() seems to be all right, but it
does not show the coefficients of the interaction of the first
pair of variables. Instead, it shows "NA":
And what package is the `stdCoeff` function in? If we don't have a
reproducible example, it's very hard to help.
What does calling the summary function on your lm object give you?
(Intercept) NA
variable.A 0.0925094150 variable.a 0.1517246479 variable.B
-0.0023847092 variable.b 0.0256653197 variable.C 0.0194313471
variable.c 0.0192897539
variable.A : variable.a NA variable.B : variable.b 0.0471111439
variable.C : variable.c 0.0696702457
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