repeating categorical variable codes

Hi Petr,

Thank you for the reply. Unfortunately my repetition is not uniform, but 
dependent on values given in column B, which varies by each row.

Does this make it any clearer?
Not much. 

let say
A <- letters[1:10]
B <- sample(1:3, 10, replace =TRUE)
A
[1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j"
B
[1] 2 3 2 3 1 1 1 3 1 1

Than
rep(A,B)
[1] "a" "a" "b" "b" "b" "c" "c" "d" "d" "d" "e" "f" "g" "h" "h" "h" "i" 
"j"

gives you repeating letters according to values in second vector. If this 
is not what you want, try to send some artificial example which 
illustrates what you really have and what is desired result.

Regards
Petr
Ric
On 5 October 2011 23:44, Petr PIKAL <petr.pikal at precheza.cz> wrote:
Hi

I would appreciate help in knowing how to repeat categorical variable
code
given in column=A, by the number in a matching column=B.
For example, I have a categorical variable code attributed to a
household=A
and want to replicate the code for all member of the household, as 
given
in
column=B. I would like to have one sequence of categorical variable
codes
for individuals in column C. I have ~9000 values in A and my C will be
~52000.

E.g
(A)    (B)      (C)
1       1         1
2       2         2
1       1         2
2       3         1
                    2
                    2
                    2

Any ideas would be gratefully accepted by a novice R user.
I am not sure if I understand your problem but does rep(A, B)

give you what you want?

rep(letters[1:3], 1:3)
[1] "a" "b" "b" "c" "c" "c"

Regards
Petr

Ric

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