Stefan Böhringer wrote:
My problem is as follows:
i is a list
Do you mean a vector?
of integers of variable length. Now I want to compute a new
vector/array
A vector or an array (which dimensions?)?
> that contains 1's at the positions indicated in i. For
example: c(2, 4) -> c(0, 1, 0, 1)
How long should the result be? max(i)???
If you mean simple vectors in both cases, i's suggest:
i <- c(2, 4) x <- numeric(max(i)) x[i] <- 1
Uwe Ligges
Using something like i = i - c(0, i[2:length(i) - 1]); sapply(i, function(x) c(rep(0, x - 1), 1)));
faces me with the problem of concatenating the result, which I could somehow not find a solution for.
Thank you very much in advance.
Stefan
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