On Nov 24, 2012, at 4:27 PM, Catriona Hendry wrote:
Hi!
I have a question that is probably very basic, but I cannot figure
out how
to do it. I simply need to compare the significance of a regression
slope
against a slope of 1, instead of the default of zero.
I know this topic has been posted before, and I have tried to use the
advice given to others to fix my problem. I tried the offset command
based
on one of these advice threads as follows:
Regression <- lm(y~x+offset(1*x))
but this resulted in a regression line that was plotted
perpendicular to
the data when added with the abline function.
If the slope were in fact == 1 then what would the offset need to be
to "correct it" so that it were == 0?
Failing this effort at clapping one hand, then please produce the
requested dataset and other bits of window dressing requested in the
Posting Guide, including whether this is a homework problem and what
your academic institution's expectations are for soliciting help over
the Internet.
--
David Winsemius, MD
Alameda, CA, USA
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