Function quantile

test/lib/ecSimpleTransform.js:36–42

(ascArr, p)

        return own.hasOwnProperty(prop);
    }
    function quantile(ascArr, p) {
        var H = (ascArr.length - 1) * p + 1;
        var h = Math.floor(H);
        var v = +ascArr[h - 1];
        var e = H - h;
        return e ? v + e * (ascArr[h] - v) : v;
    }

    var METHOD_INTERNAL = {
        'SUM': true,