``` R x = list(1:5, 6:8) x # [[1]] # [1] 1 2 3 4 5 # # [[2]] # [1] 6 7 8 ``` ``` R transpose(x) # fill = NA is default # [[1]] # [1] 1 6 # # [[2]] # [1] 2 7 # # [[3]] # [1] 3 8 # # [[4]] # [1] 4 NA # # [[5]] # [1] 5 NA ```