zeileis at ci.tuwien.ac.at
Sat May 11 18:51:04 CEST 2002
syed gillani wrote:
> Hi all,
> I have read in an epiinfo rec file with more than 100 variables and about
> 5500 rows. Among the variables are the following three: OB, a 0,1 coded
> variable indicating the presence of obesity, GEN, a 1,2 coded variable
> indicating gender and AGEGP, a variable with values ranging from 1 to 11,
> indicating agegroups.
> How could I make a barplot showing male and female obese persons by age
I guess the simplest way is to first create a table with the information
you want, probably something like:
R> mytable <- xtabs(~ GEN + AGEGP, data = mydata, subset = OB == 1)
If you code the variables as factors with proper labels then the labels
of the barplot will also be done automatically.
> syed at saudionline.com.sa
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