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2009 Feb 22
2
Convert a list to matrix
I would like to convert a list to matrix. This can be easily achieved via do.call. The only problem is each element of the list has different length, which causes the recycling of values. How can I have NA instead of recycled values ? m <- list() m[["A"]] <- 1 m[["B"]] <- 2:3 do.call(rbind, m) [,1] [,2] A 1 1 B 2 3 [[alternative HTML version deleted]]