Difference between revisions of "Serpentine.m"
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S=serpentine(nlevels,idx_base) | S=serpentine(nlevels,idx_base) | ||
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nlevels - dimension of the matrix, a | nlevels - dimension of the matrix, a | ||
Revision as of 18:52, 5 June 2026
Serpentine index matrix used in Spinach for single-index numbering of matrix elements.
Syntax
S=serpentine(nlevels,idx_base)
Parameters
nlevels - dimension of the matrix, a
positive real integer
idx_base - indexing base, 0 or 1
Outputs
S - serpentine matrix, for example (base 1):
(1 )(3 )(6 )(10)
(2 )(5 )(9 )(13)
(4 )(8 )(12)(15)
(7 )(11)(14)(16)
or (with indexing set to base 0):
(0 )(2 )(5 )(9 )
(1 )(4 )(8 )(12)
(3 )(7 )(11)(14)
(6 )(10)(13)(15)
Examples
See examples in the Spinach distribution relevant to this function.
Notes
This page was generated from the function header in the Spinach repository.
See also
Version 2.11, authors: Ilya Kuprov
