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dominic
2004 Jan 12
1
question about how summary.lm works
Hi,
While exploring how summary.lm generated its output I came across a section
that left me puzzled.
at around line 57
R <- chol2inv(Qr$qr[p1, p1, drop = FALSE])
se <- sqrt(diag(R) * resvar)
I'm hoping somebody could explain the logic of these to steps or
alternatively point me in the direction of a text that will explain these
steps.
In particular I'm puzzled
2004 Feb 20
0
setting options when using eval
Hi All,
I'm using a call to eval to evaluate a linear model, however, I have found
that despite calling
options (contrasts=c("contr.sum", "contr.poly"))
prior to evaluation, my model factors are coded using the indicator
coding associated with the "contr.treatment" contrast option
As an inelegant work around I am setting the contrast option explicitly in