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":
(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
This happens with all my data frames, there is always a problem with the first
pair of variables. Does anyone have an idea why R does not compute the
coefficients of "variable.A : variable.a"?
Thanks in advance!
Best regards,
Jennifer
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
