[R] Different result of multiple regression in R and SPSS

Bert Gunter gunter.berton at gene.com
Wed Jul 20 15:51:52 CEST 2011

On Tue, Jul 19, 2011 at 4:19 PM, J. <seoulseoulseoul at gmail.com> wrote:
> @Dimitri: I tried to enter it as numeric and still got the same outcome. I
> still wonder if there is any way to get the same result from both programs.

There is. ?C ?contrasts

But of course you must do your homework to understand how to use
these. (See the quote in my signature).

-- Bert

> @David, Bert: Yes, I found that the gender coefficient is R is exactly twice
> that of the one from SPSS. Need to study on parametrization.
> Thanks,
> Jay
 PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

"Men by nature long to get on to the ultimate truths, and will often
be impatient with elementary studies or fight shy of them. If it were
possible to reach the ultimate truths without the elementary studies
usually prefixed to them, these would not be preparatory studies but
superfluous diversions."

-- Maimonides (1135-1204)

Bert Gunter
Genentech Nonclinical Biostatistics

More information about the R-help mailing list