# Command: Drop

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Name:

    Drop - remove element sequences from an array

Synopsis:

      array  n Drop	 remove the first n elements
      array -n Drop	 remove the last n elements
      array [n] Drop	 remove the nth element
      array [n1 n2] Drop	 remove elements n1 through n2
      array [n1 n2 s] Drop	 remove elements n1 through n2 in steps of s
      array {[seq1]...[seqn]} Drop   return a nested list in which elements
      specified by seqi are removed at level i in list.

Examples:

      [4 9 -7 3 2 11] 2 Drop   --> [-7 3 2 11]
      [4 9 -7 3 2 11] -2 Drop   --> [4 9 -7 3]
      [1 2 3 4 5] [-2] Drop	 --> [1 2 3 5]
      [1 2 3 4 5] [1 -2] Drop   --> [5]
      [1 2 3 4 5] [1 -2 2] Drop --> [2 4 5]
      [1 2 3 4 5] [1 -1 2] Drop --> [2 4]

      [[-9 -12] [6 7]] {[2] [1]} Drop --> [[-12]]

Bugs:

      The list of sequences is represented by a procedure. This has delayed
      evaluation which may cause undesired effects. Should be replaced in a
      future versionby a new container type for parameter lists of undefined
      length. Candidate delimiters are <...> with cva as the only access method.
      Just using [...] as the container is ambiguous.

References:

      [1] The Mathematica Book V4.0 "Take"

Author:

    Diesmann

FirstVersion:

    2007.11.28

SeeAlso:

- Take
- Part
- MathematicaToSliIndex
- erase

Source:

    /opt/conda/conda-bld/nest_1512421404550/work/nest-2.12.0/lib/sli/mathematica.sli

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