R help - Apr 2012 - linear-by-linear association model in R?

Dear all, can somebody give me some pointer how I can fit a
"linear-by-linear association model" (i.e. loglinear model for the
ordinal variables) in R? A brief description can be found here
'https://onlinecourses.science.psu.edu/stat504/node/141'.

Thanks for your help

On 4/2/2012 3:34 AM, Christofer Bogaso wrote:
> Dear all, can somebody give me some pointer how I can fit a
> "linear-by-linear association model" (i.e. loglinear model for
the
> ordinal variables) in R? A brief description can be found here
> 'https://onlinecourses.science.psu.edu/stat504/node/141'.
>
> Thanks for your help
>
See my short course, http://www.datavis.ca/courses/VCD/

in particular, http://www.datavis.ca/courses/VCD/R/mental-glm.R

# fit linear x linear (uniform) association.  Use integer scores for 
rows/cols
Cscore <- as.numeric(Mental$ses)
Rscore <- as.numeric(Mental$mental)
linlin <- glm(Freq ~ mental + ses + Rscore:Cscore,
                 family = poisson, data = Mental)



-- 
Michael Friendly     Email: friendly AT yorku DOT ca
Professor, Psychology Dept.
York University      Voice: 416 736-5115 x66249 Fax: 416 736-5814
4700 Keele Street    Web:   http://www.datavis.ca
Toronto, ONT  M3J 1P3 CANADA

dear Christofer,

Try the following

d<-expand.grid(a=1:3,b=1:4)
d$freq<-rpois(12,5)
o<-glm(freq~factor(a)+factor(b)+I(a*b), family=poisson, data=d)

vito


Il 02/04/2012 9.34, Christofer Bogaso ha scritto:
> Dear all, can somebody give me some pointer how I can fit a
> "linear-by-linear association model" (i.e. loglinear model for
the
> ordinal variables) in R? A brief description can be found here
> 'https://onlinecourses.science.psu.edu/stat504/node/141'.
>
> Thanks for your help
>
> ______________________________________________
> R-help at 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.
>
-- 
===================================Vito M.R. Muggeo
Dip.to Sc Statist e Matem `Vianelli'
Universit? di Palermo
viale delle Scienze, edificio 13
90128 Palermo - ITALY
tel: 091 23895240
fax: 091 485726
http://dssm.unipa.it/vmuggeo