From: Witold Eryk Wolski <W.E.Wolski_at_ncl.ac.uk>

Date: Mon 21 Mar 2005 - 20:03:21 EST

Date: Mon 21 Mar 2005 - 20:03:21 EST

Thanks a lot

cheers

Eryk

Marc Schwartz wrote:

>For a me too post, I agree with Andy's recommendation, which in turn is

*>supported by "How to Report Statistics in Medicine" by Lang and Secic,
**>ACP, 1997. There is an example table (8.2) on page 133.
**>
**>HTH,
**>
**>Marc Schwartz
**>
**>On Sun, 2005-03-20 at 15:44 -0500, Liaw, Andy wrote:
**>
**>
**>>I'd suggest a $\times$ b, as you'd find in most stat textbook.
**>>
**>>Andy
**>>
**>>
**>>
**>>>From: Witold Eryk Wolski
**>>>
**>>>Dear Rgurus,
**>>>
**>>>Interaction terms in the linear models function lm are
**>>>specified by the
**>>>colon :
**>>>eg: x ~ a + b + a:b
**>>>
**>>>a shortcut for the above is:
**>>> x ~ a*b
**>>>
**>>>the output if calling anova on the lm object will be the same
**>>>in both cases
**>>>
**>>>a ....
**>>>b ....
**>>>a:b ...
**>>>Resdiuals ...
**>>>
**>>>What I am wondering is how the interaction term (a:b) given
**>>>above should
**>>>be written in a table in an manuscript?
**>>>
**>>>a ) a*b
**>>>b ) a$\cdot$ b
**>>>c ) a:b
**>>>d) ....
**>>>
**>>>Cheers Eryk.
**>>>
**>>>
**>>>
**>
**>______________________________________________
**>R-help@stat.math.ethz.ch mailing list
**>https://stat.ethz.ch/mailman/listinfo/r-help
**>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
**>
**>
**>
**>
*

-- Witold Eryk Wolski __("< School of Mathematics and Statistics _ \__/ University of Newcastle 'v' || Newcastle upon Tyne, NE1 7RU, ENGLAND / \ ^^ mail: witek96@users.sourceforge.net m m Phone : 044 (0)191 222 5376 FAX : 044 (0)191 222 8020 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.htmlReceived on Mon Mar 21 20:07:51 2005

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