Hi all,

is there a way to transform an RleList (or a list of Rle's) into a RleArray / RleMatrix?

My use case is that I have a loop / lapply that returns a list of Rle objects that I would like to store as a RleMatrix (each column as an Rle).

Minimal example:

x <- Rle(10:1, 1:10)
rl <- RleList(x, x)

Ideally, something like

rm <- RleArray(rl, dim=c(length(x), length(r1))

or

rm <- as(rl, "RleArray")

The more realistic (but not reproducible at this moment example):

idx <- c(50, 100)
rleBinCovList <- lapply(idx, function(win) {
        runsum(chrCovRle, k=win, endrule="constant")
    })

Or perhaps is there a way to create directly a RleArray?

Thanks! Davide

rm <- RleArray(unlist(rl), c(lengths(rl)[1], length(rl))) will give you what you want (the unlist() is cheap because of how an RleList is defined). With some checks added, this could become the as(rl, "RleArray") method.