n(1500);
    })
    .logEvents(true)
    .on("initEnd", render);

function attributer(datum, index, nodes) {
    var selection = d3.select(this);
    if (datum.tag == "svg") {
        var width = "600";
        var height = "400";
        var x = "10";
        var y = "10";
        selection
            .attr("width", width + "pt")
            .attr("height", height + "pt")
            .attr("viewBox", -x + " " + -y + " " + width + " " + height);
        datum.attributes.width = width + "pt";
        datum.