Delete

Delete[expr,n]

deletes the element at position n in expr. If n is negative, the position is counted from the end.

Delete[expr,{i,j,}]

deletes the part at position {i,j,}.

Delete[expr,{{i1,j1,},{i2,j2,},}]

deletes parts at several positions.

Delete[pos]

represents an operator form of Delete that can be applied to an expression.

Details

  • Deleting the head of a particular element in an expression is equivalent to applying FlattenAt to the expression at that point. »
  • Deleting the head of a whole expression makes the head be Sequence. »
  • Deleting a whole expression gives the result Sequence[].
  • Delete works on SparseArray objects.
  • Delete works on associations, deleting elements with the specified keys.
  • Delete[pos][expr] is equivalent to Delete[expr,pos].

Examples

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Basic Examples  (5)

Delete the element at position 3:

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Delete at position 2 from the end:

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Delete at positions 1 and 3:

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Delete in a 2D array:

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Delete from an Association:

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Generalizations & Extensions  (3)

Properties & Relations  (1)

See Also

Insert  MapAt  ReplacePart  FlattenAt  DeleteCases  Drop  StringDrop  Position  DeleteMissing  Nothing

Tutorials

Introduced in 1991
(2.0)
| Updated in 2014
(10.0)