FIRST:
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
If you expect an answer, please provide the data. Here is one way of doing it:
> N <- 30
> x <- data.frame(A=sample(1:3, N, TRUE), B=sample(1:2,
R-helpers:
I have a data frame containing 4 factor variables (let's say A,B,C,
and D) and 1 numerical variable (N). I would like to produce a
cross-tabulated data frame in which A,B,C are individual columns, each
factor of D is its own column, and the field is calculated as a given
functi
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