Hi
How do I get the output from table() in matrix form?
If I have
R> table(c(1,1,1,1,2,20))
1 2 20 4 1 1
I want
[,1] [,2] [,3] [1,] 1 2 20 [2,] 4 1 1
The problem is that names(table) is a vector of characters and I need the numeric values.
I am using
R> rbind(as.integer(names(x)),x)
I thought tabulate() might be better as it takes an integer-valued vector, but it isn't
quite right because the default bins are 1:20 and I don't want the zeroes.
The following is a little clunky:
R> x <- rbind(1:20,tabulate(c(1,1,1,1,2,20)))
R> x[,x[2,]>0]
[,1] [,2] [,3]
[1,] 1 2 20
[2,] 4 1 1Is there a better way? It seems inelegant to coerce a character vector back to integers,
but OTOH it's wasteful to have 20 bins when I only need 3. My real application would have
maybe a dozen distinct (prime) integers in the range 2 up to about 1e4.
-- Robin Hankin Uncertainty Analyst Southampton Oceanography Centre European Way, Southampton SO14 3ZH, UK tel 023-8059-7743
______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
