count.perms.fixed.points

perm.length

fixed

Given the number of items in the permutations and the number of fixed points f,
how many permutations are there with f fixed points?

Includes functions to work with the Mallows, Generalized Mallows and Weighted Mallows Models. The considered distances are Kendall's-tau, Cayley, Hamming and Ulam and it includes functions for making inference, sampling and learning such distributions, some of which are novel in the literature. As a by-product, PerMallows also includes operations for permutations, paying special attention to those related with the Kendall's-tau, Cayley, Ulam and Hamming distances and the random generation of permutations.

count.perms.fixed.points: Count permutations with a given number of fixed points

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