Hello members,
I have a simple tabluation question that has been bugging me for a bit. I
would appreciate any assistance with it.
Suppose I have the following data.frame
x
X1 X2 X3 X4
1 name1 Letter A 1 cat a
2 name1 Letter B 2 cat
3 name1 Letter A 3 bb
4 name1 Letter B 1 re
5 name1 Letter A 2 cat a
6 name2 Letter B 3 cat
7 name2 Letter A 1 bb
8 name2 Letter B 2 re
9 name2 Letter A 3 cat a
10 name2 Letter B 1 cat
I would like a tabulation for each category in X1 when X2 contains the
letter "A", and X4 has occurrence "cat a"
my.names <- unique(x$X1)
my.names2 <- factor(x$X1, my.names)
table(my.names2, regMatch(x$X4, "cat a") & regMatch(x$X2, "A"))
FALSE TRUE
name1 3 2
name2 4 1
I'm only after the true occurences not the false column. How do I put this
conidtion into the table command without using the "[,2]" at the end of the
command.
Thank you for any help.
Colin
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