a = Table[i, {i, 1, 10}]
Drop[a, {5, 8}]
If go with the above procedure, It will delete all the elements from between position 5 to 8. How to drop elements which are a position 5 and position 8 using drop function.
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2 Answers
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Use instead Delete, in this way:
a = Table[i, {i, 1, 10}];
Delete[a, {{5}, {8}}]
(*
{1, 2, 3, 4, 6, 7, 9, 10}
*)
By the way, you can be far more efficient:
a = Range[10]
answered Nov 29, 2018 at 7:25
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$\begingroup$ can we give the list of position which I wanted to drop like {3,5,8,9} $\endgroup$ Nov 29, 2018 at 7:49
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2$\begingroup$ Also
Delete[a, Partition[{3, 5, 8, 9}, 1]]comes to mind... if the list of positions gets longer. $\endgroup$ Nov 29, 2018 at 8:04
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Drop[a, {5, 8, 3}]
{1, 2, 3, 4, 6, 7, 9, 10}
Fold[Drop[#, {#2}] &, a, Reverse[{5, 8}]]
{1, 2, 3, 4, 6, 7, 9, 10}
