$(document).ready(function() {
    var url = 'https://datahaven.carto.com/api/v2/viz/5ef77788-477a-11e6-bf7b-0ee66e2c9693/viz.json';

    cartodb.createVis('container', url)
        .done(function(vis, layers) {
            $('input[type=radio][name=burden]').change(function(e) {
                var num = +$(this).val();
                createSelector(layers[1], num);
            });
        });

    function createSelector(layer, num) {
        for (var i = 0; i < layer.getSubLayerCount(); i++) {
            if (i === num) {
                layer.getSubLayer(i).show();
            } else {
                layer.getSubLayer(i).hide();
            }
        }
    }
});