npm promotes metadefinitions
    Share your code. npm Orgs help your team discover, share, and reuse code. Create a free org »

    multinomialpublic

    multinomial

    Computes multinomial coefficients. Also allows efficiently computing entire sets of binomial and multinomial coefficients in one go.

    Example

     
    var multi = require("multinomial")
     
    console.log(multi(7, 4, 2)) // Prints: 25740

    Install

    npm install multinomial
    

    require("multinomial")(a0, a1, ... )

    Computes the multinomial coefficient, or in other words:

         /                     \
        |  a0 + a1 + a2 + ...   |
        |                       |
        | a0   a1    a2   ...   |
         \                     /
    

    Note You can also pass an array as input instead of a list of arguments.

    require("multinomial").multinomials(n, d)

    Returns an object containing:

    • counts An array containing "histograms" of the d numbers (each histogram sums to n).
    • coefs An array with the multinomial coefficients corresponding to the histograms in `counts'.

    Note that the order in which the coefficients are returned is fixed, but that it is not recommended to rely on this (other orders might have benefits over this one, so it might change in the future).

    require("multinomial").binomials(n)

    Conceptually the same as require("multinomial").multinomials(n, 2), but just returns the list of coefficients. In this case, the order of the coefficients is guaranteed. In particular, the i-th coefficient gives the number of ways in which one can pick i out of n positions.

    Credit

    (c) 2013 Mikola Lysenko. MIT License

    install

    npm i multinomial

    Downloadsweekly downloads

    0

    version

    1.0.0

    license

    MIT

    repository

    githubgithub

    last publish

    collaborators

    • avatar
    • avatar
    • avatar
    • avatar
    • avatar
    • avatar