Hello,
I have a df, pp, with five variables:
> nobs(pp)
q10_1 q10_2 q10_3 q10_4 actcode
1620 1620 1620 1620 1620
I want to create a loop to run four xtabs (the first four variables above by
the fifth) and then store the results in a matrix. Below I make my intent
clear by showing the output of one xtab which is inserted into a matrix.
> a <- xtabs(q10_1 ~ actcode)
> a
actcode
1 2 3 4 5 6 7 8 9 10
7 11 3 60 66 56 21 40 7 8
> freq.mat <- matrix(0, 4, 10, byrow = TRUE)
> freq.mat[1,] <- a
> freq.mat
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] 7 11 3 60 66 56 21 40 7 8
[2,] 0 0 0 0 0 0 0 0 0 0
[3,] 0 0 0 0 0 0 0 0 0 0
[4,] 0 0 0 0 0 0 0 0 0 0
===============================================================
I have spent a couple of hours searching the web and my texts but continue to
strike out in my attempts to construct a correct formulation of this simple
loop. Help would be appreciated.
Greg Blevins
The Market Solutions Group, Inc.
Windows XP
R 2.0.1
Pentium 4
512 memory
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