Changing positions of nodes and links in D3 v4 force layout during transition

Utilizing D3 v4 to create a dynamic social network visualization, I have included an example at the following link: https://jsfiddle.net/wand5r6L/1/.

In this particular example, there are two years worth of data being displayed. My goal is to update the nodes and links when transitioning from 2004 to 2005. However, currently when new nodes and links are added, their positions simply pop out abruptly without any smooth transition from the original location of old nodes and links.

I attempted to incorporate the transition() method within the tick() function but encountered issues that led to more bugs instead of fixing the problem.

If anyone has suggestions or recommendations on how to achieve a seamless transition in node and link positions with the addition of new elements, I would greatly appreciate your input. Thank you in advance.

javascriptd3.jsforce-layout

Answer №1

Check out this force layout block example by Mike Bostock that has been modified:

https://bl.ocks.org/mbostock/0adcc447925ffae87975a3a81628a196

Here is an updated version of the jsfiddle that I forked from the original. I made some modifications, particularly specifying a key function in the data links:

https://jsfiddle.net/eonny83k/1/

 var node = g2
  .attr("class", "nodes")
  .selectAll("circle")
  .data(nodeData, function(d) { return d.source + '-' + d.target });

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