Message-ID: <3EC627D8.1020309@nac.spb.ru>
Date: 2003-05-17T12:15:20Z
From: Kosenkov Kirill
Subject: how to handle 'multiresponse' variable?
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!