Quantiles

gistfile1.js

/**
 * Quantile breaks in a dataset
 * @param {array}: data list of data.
 * @param {number}: n number of breaks.
 * @return {array} of break places.
 */
function quantile(data, n) {
    return _.select(data.sort(), function(val, index) {
        return index % (data.length / (n - 1)) == 0;
    }).concat(_.max(data));
}