bayesian-changepoint/lib/Gamma.js

Useful Grid algorithm from Material-UI (https://github.com/mui-org/material-ui)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
class Gamma {
    logGamma(x) {
        const tmp = (x - 0.5) * Math.log(x + 4.5) - (x + 4.5);
        const ser = 1.0 +
            76.18009173 / (x + 0) -
            86.50532033 / (x + 1) +
            24.01409822 / (x + 2) -
            1.231739516 / (x + 3) +
            0.00120858003 / (x + 4) -
            5.36382e-6 / (x + 5);
        return tmp + Math.log(ser * Math.sqrt(2 * Math.PI));
    }
}
exports.default = Gamma;