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POHow to remove existing nodes in d3.js
 

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    <p><br /> I have already visit <a href="https://stackoverflow.com/questions/11606214/add-and-remove-nodes-in-d3js?lq=1">add and remove nodes in D3js</a> but it don't solve my problem.</p> <p>There are some nodes at first time, then I want to add nodes dynamically and want if node is already exists it update that nodes and don't do duplicate.</p> <p>now it is making duplicate not updating existing ones.<br /> Here is main code and full code and working fiddle is <a href="http://jsfiddle.net/qYStf/1/" rel="nofollow noreferrer">here</a></p> <pre><code>//handles node elements var circles = svg.selectAll('g'); //update graph (called when needed) function restart() { /*************************************** Draw circles (nodes) ****************************************/ circles = circles.data(data.nodes); var g = circles.enter() .append("g") .attr("class", "gNode") .attr("cursor", "pointer") .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; }) .call(force.drag); g.append("circle") .attr({ "class": "node", "cx": function(d) { return rScale(d.NumOccurrences); }, "cy": function(d) { return rScale(d.NumOccurrences); }, "r": function(d) { return rScale(d.NumOccurrences); } }) .style("fill", function(d, i) { return colors(i); }) .style("stroke", "#000"); g.append("text") .attr({ "x": function(d) { return rScale(d.NumOccurrences); }, "y": function(d) { return rScale(d.NumOccurrences); }, "font-family": "sans-serif", "font-size": "20px", "fill": "black", "text-anchor": "middle" }) .text( function (d) { return d.name; }); g.append("title") .text(function(d) { return d.name; }); // remove old nodes circles.exit().remove(); // set the graph in motion force.start(); } // app starts here restart(); function dynamicAddNodes() { var updatedata = {"name":"ios","NumOccurrences":"500","color":"green","x":0,"y":1} data.nodes.push(updatedata); restart(); } setInterval(dynamicAddNodes, 10000); </code></pre>
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