2
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Consider the following list, with sublists of different lengths

list = {{{0.8, 0.8, 0.8}}, {{1, 1, 1}, {4, 1, 1}, {3, 3, 2}}, {{1.2, 
     1.2, 1.2}}, {{1.4, 1.4, 1.4}}, {{1.6, 1.6, 1.6}, {4, 2, 2}}};
Map[Length, list]; (*{1, 3, 1, 1, 2}*)
n = Max[%]; (*3*)

how can this this list be separated into n lists of the length of the original list, where the positions of the elements are maintained, i.e, the output should be

e1={{{0.8, 0.8, 0.8}}, {{1, 1, 1}}, {{1.2, 1.2, 1.2}}, {{1.4,1.4,1.4}}, {{1.6, 1.6, 1.6}}}
e2={{}, {{4, 1, 1}}, {}, {}, {{4, 2, 2}}}
e3={{}, {{3, 3, 2}}, {}, {}, {}}
$\endgroup$
5
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Transpose @ PadRight[list, Automatic, {}]
{{{0.8, 0.8, 0.8}, {1, 1, 1}, {1.2, 1.2, 1.2}, {1.4, 1.4, 1.4}, {1.6, 1.6, 1.6}},
 {{}, {4, 1, 1}, {}, {}, {4, 2, 2}}, 
 {{}, {3, 3, 2}, {}, {}, {}}}
Transpose[PadRight[list, Automatic, {}]] /. p : {__?NumericQ} :> {p}
{{{{0.8, 0.8, 0.8}}, {{1, 1, 1}}, {{1.2, 1.2, 1.2}}, 
  {{1.4, 1.4, 1.4}}, {{1.6, 1.6, 1.6}}}, 
 {{}, {{4, 1, 1}}, {}, {}, {{4, 2, 2}}}, 
 {{}, {{3, 3, 2}}, {}, {}, {}}}
$\endgroup$

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