Could u add the feature to zoom in the graph?

[Nelvin Tan]

Thank you for the graph, I have around 500+ nodes and would like to zoom in the graph. I tried using advice from this but it did not work... :(

[Nelvin Tan]

Sorry for the trouble I figured it out.

Just add this few blocks of code and zooming in/out works:

var svg = d3.select("#svg-body")
  .append("svg:svg")
    .attr("width", 800)
    .attr("height", 600)
    .attr("pointer-events", "all")
  .append('svg:g')
    .call(d3.behavior.zoom().on("zoom", redraw))
  .append('svg:g');

function redraw() {
  console.log("here", d3.event.translate, d3.event.scale);
  svg.attr("transform",
      "translate(" + d3.event.translate + ")"
      + " scale(" + d3.event.scale + ")");
}