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  "Title": "Combinatorics Utilities",
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  "Description": "Provides routines for combinatorial enumeration including\ngeneration of all combinations, permutations, and lattice\npoints on hypercuboids and simplex lattices. Includes utilities\nfor multinomial distributions: the multinomial probability mass\nfunction, random sampling with varying parameters, and encoding\nconversions between simplex representations. Also supplies\nexact and log-scale factorial computation and the generalized\nbinomial coefficient for real-valued n.  Package functions\ninclude procedures described in Reingold, Nievergelt and Deo\n(1977) Combinatorial Algorithms: Theory and Practice\n(dl.acm.org/citation.cfm?id=1096489), Feller volume 1, and\nNijenhuis and Wilf (1978) Combinatorial Algorithms for\nComputers and Calculators (ISBN 0125192606 / 9780125192606).",
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      "title": "Generate all combinations of the elements of x taken m at a time.",
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        "combn2",
        "nCm"
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      "title": "density of multinomial, and support functions",
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        "logfact"
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      "title": "Generate random samples from multinomial distributions",
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        "rmultz2"
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      "topics": [
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      ]
    },
    {
      "page": "xsimplex",
      "title": "Generates all points on a (p,n) simplex lattice (i.e. a p-part composition of n).",
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