[R] how to handle 'multiresponse' variable?

[Fan]

There were some discussions in the past on this subject.
AFAK, there're actually useful functions in Frank Harell's package
"hmisc", like mChoice() and summarize(). For the detail
go to the R search page

http://finzi.psych.upenn.edu/search.html

and search

"Frank Harrell type multi-valued variable".

--
Fan

Kosenkov Kirill wrote:
> Hello!
> 
> I have dataset where one variable is 'multiresponse', like this:
> [1] "1 2" "1 2 3" "4" "1 4" "4 3" etc.
> 'responses' separated by space. observations in different 'rows' of 
> data.frame.
> I can do strsplit(data$var,' ') and make a list, where multiple 
> responses are elements of character vectors, like this:
>  $ P124               :List of 2956
>   ..$ : chr  "2" "4"
>   ..$ : chr  "1" "2"
>   ..$ : chr "NA"
>   ..$ : chr  "3" "4"
>   ..$ : chr "3"
> 
> I need to compute crosstabulation on this variable, to make 
> crosstabulation where this variable is a factor variable (responses of 
> this variable are categories, in which i need to compute distributions 
> of other variables). And i need to do crosstabulation with 'weights', 
> like in xtabs(w~f1+f2).
> 
> Is any way exists to do such things with 'multiresponse' variables in R 
> or i need to write my own functions to handle it?
> 
> Thanks!
> 
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