FACTORADIC

Version 1.1.0.0 (1,77 ko) par Darren Rowland
Obtain the factorial radix representation of a number.
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Mise à jour 27 avr. 2009

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F = factoradic(M,N) returns the conversion of integer M into factorial radix. F is a 1-by-N vector. The factoradic is also known as the Lehmer Code. The factoradic of M is best understood by example.

Example: 89 = 3x4! + 2x3! + 2x2! + 1x1! + 0x0!
therefore factoradic(89,5) = (3,2,2,1,0)

M must lie in the range [0 : N!-1].
Leading zeros will be present in F when M < (N-1)!-1.

Example: factoradic(19,6) = (0,0,3,0,1,0)

A practical use of the factoradic is the generation of permutations. See ONEPERM on the File Exchange.

Citation pour cette source

Darren Rowland (2024). FACTORADIC (https://www.mathworks.com/matlabcentral/fileexchange/23066-factoradic), MATLAB Central File Exchange. Récupéré le .

Compatibilité avec les versions de MATLAB
Créé avec R14
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Version Publié le Notes de version
1.1.0.0

Thanks to Stefano Bolli for noticing a typo in the error-checking.
1.0.0.0