try this then:
x <- sample(LETTERS, 1100, TRUE)
y <- sample(0:1, 1100, TRUE)
#########
ind <- as.logical(y)
table(x) # all
table(x[ind]) # ones
table(x[!ind]) # zeros
Best,
Dimitris
----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
----- Original Message -----
From: <Ita.Cirovic-Donev@hypo-alpe-adria.com>
To: <s-news@lists.biostat.wustl.edu>
Sent: Monday, November 20, 2006 3:10 PM
Subject: [S] count occurrences
Sorry, I have an addition to previous email. I also have a vector of
zeros
and ones of equal length as the first vector. The counting should be
done
in the following way:
count each A where it is equal to zero
count each A where it is equal to one
and so on for the rest of the qualitative marks.
thanks
--------
Hi,
I have a vector with qualitative values such as A,B,C,D,E,F,G. The
length
of the column is 1100. I would like to go through the vector an
count the
occurrences of A, B,C and so on and record the values in the new
vector. Is
there a function that does a counting in this way that I can insert
into
the for loop. Thanks.
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