I am a new Mathematica user, I am attempting to use ArrayFlatten but it seems not to work in this case. My codes are below,
w = IntegerPartitions[10, {3}]
x = Permutations[{a, b, c}, {3}]
simlength = Length[x]
simp = Transpose@w[[1 ;;]] x[[#]] & /@ Range[1, simlength, 1]
simp//MatrixForm
then I use
ArrayFlatten[...Outputfromprevioushere...]//MatrixForm
ArrayFlatten seems to have no effect at all. Is there anything I might be missing? Thanks a lot

Transpose[ArrayFlatten[{simp}]] // MatrixFormgive the desired output? – kglr Apr 23 '17 at 22:30