search for: durf

...This code works perfectly fine but stops doing so if I put it into a loop: sums <- list() for(i in 1:length(start)) { for(j in 1:length(unlist(start[[i]]))) { sums[[i]][j] <- list(sum(unlist(sequence[[i]])[unlist(start[[i]])[j]:unlist(end[[i]])[j]])) }} The output looks like this: > durF[[2]] [[1]] [1] 387.064 [[2]] [1] 302.541 [[3]] [1] 734.028 instead of: > durF[[2]] [[1]] [1] 387.064 302.541 734.028 Something seems to be wrong with the indexing but no idea how to fix it. I am not ambitious about creating elegant loops, they simply should work - so please do not hesitate...