# Command: MathematicaToSliIndex

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Name:

    MathematicaToSliIndex - Convert Mathematica-like indices to SLI indices

Synopsis:

    [array] mathematicaIndex MathematicaToSliIndex -> [array] sliIndex

Examples:

      [3 5 6 9 11] -2	 MathematicaToSliIndex -> [3 5 6 9 11] 3
      [3 5 6 9 11] [ -2 2 ] MathematicaToSliIndex -> [3 5 6 9 11] [3 1]

Description:

      "MathematicaToSliIndex" converts Mathematica-like indices
      to SLI indices.
      For an array of size N, valid SLI indices are in the range 0..N-1
      while valid Matematica indices are in the range -N..-1, 1..N
      (negative indices indicating backward indexing from the end of the
      array).

      The given array is left untouched, solely its length is taken to
      correctly map negative Mathematica indices to the correct SLI
      indices.

      Alternatives: Function MathematicaToSliIndex_i if index is a
      number (example 1) and  MathematicaToSliIndex_a if index is an
      array (example 2) (both undocumented) -> behaviour and synopsis are
      the same.

Remarks:

    Commented Ruediger Kupper

Author:

    Markus Diesmann

SeeAlso:

- SliToMathematicaIndex

Source:

    /opt/conda/conda-bld/nest_1512418773968/work/nest-2.14.0/lib/sli/mathematica.sli

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