[R] convert day of week from number to character and include in lm

[Peter Dalgaard]

Ferdinand Alimadhi <falimadhi at iq.harvard.edu> writes:

> lm(dep ~ as.factor(WKDY)
> 
> but if you want WKDYs as character you can make the appropriate changes 
> in your dataset
> 
>  > days<-c("mon","tue","wed","thu","fri","sat","sun")
>  > for(i in 1:7)
> + D$WKDY[D$WKDY==i]<-days[[i]]
> 
> suppossing that D is your dataframe


Come on...

  factor(WKDY, labels=days)

If you insist on a character result, take as.character(), or just

  days[WKDY]

 
> HTH
> 
> Spencer Jones wrote:
> 
> >All,
> >
> >I am trying to include a day of week variable (1-7) in in a regression
> >model. I would like to have the day of week treated as a categorical
> >variable rather than a number
> >
> >the code looks like
> >
> >lm( dep ~ WKDY)
> >
> >I know this is a basic question, but help would be appreciated
> >
> >thanks
> >
> >spencer
> >
> >	[[alternative HTML version deleted]]
> >
> >______________________________________________
> >R-help at 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
> >and provide commented, minimal, self-contained, reproducible code.
> >
> >  
> >
> 
> 
> -- 
> Ferdinand Alimadhi
> Programmer / Analyst
> Harvard University
> The Institute for Quantitative Social Science
> (617) 496-0187
> falimadhi at iq.harvard.edu
> www.iq.harvard.edu
> 
> ______________________________________________
> R-help at 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
> and provide commented, minimal, self-contained, reproducible code.
> 

-- 
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