Hi,
 
try ?table
 
# for example
 
(s3 <- table(s))
 
# and if you want a single value
 
s3["a"]
# or
s3[1]
 
HTH,
Colin.
 
 

________________________________

From: r-help-bounces@r-project.org on behalf of Marc Giombetti
Sent: Tue 17/11/2009 22:55
To: r-help@r-project.org
Subject: [R] Basic question on nominal data



Hello everybody,

I am new to R and I have a very basic question, but I couldn't get
this to work.
Let's say I have a vector

s = c("a","a","a","b","b","c","c","c","c")
s1 <- factor(s)

s2 <- summary(s1) leads to the following
a b c
3 2 4


How can I access the different aggregated values for a b and c? I am
not quite sure if the factor method is the right approach.
I tried to use s2$a but it didn't work.

Any suggestions?

Thanks a lot for your help

Marc

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