从显示其关系的csv文件中获取连接的节点数

Question

I have a large csv file that is in the format:

ServerID|AppID
   01   |  01
   01   |  02
   02   |  02
   02   |  03
   02   |  04
   03   |  04

I am using this data in a d3 force layout as shown in this plunker . The key bit of code to get the relations between the servers and apps (IE what apps are on what servers) is:

links.forEach(function (link) {
    link.ApplicationName= nodeByName(link.ApplicationName, "A");
    link.Servername = nodeByName(link.Servername, "S");

    edges.push({ source: link.ApplicationName, target: link.Servername })
});

function nodeByName(name, SorA) {
    var groupNo = 0;
    switch (SorA) {
        case "A":
            groupNo = 1;
            break;
        case "S":
            groupNo = 2;
            break;
        default:
        groupNo = 0;
    }
    return nodesByNames[name] || (nodesByNames[name] = { Name: name, group: groupNo });
}

which generates a unique list of servers and apps to create the nodes, and a separate list ( edges ) which has the relations between the servers and apps and is used to create the lines linking the nodes.

I want to be able to set the radius of the server nodes based off the number of apps running on them. I am struggling to think of an elegant way to get and store this information in the current system. Is there anything in d3 already that can help here, or can someone see a way to do this given the current code?

Answer 1

Updated plnkr : http://plnkr.co/edit/gtAcJinltdjkgu1MEPmY?p=preview

var circles = node.append("circle")
  .each(function(d) {
    d.amountOfNeighbours = 0;
    link.each(function(e) {
      console.log(e)
      if (e.source.Name == d.Name) { //if the source of the link is this node, amountOfNeighbours++
        d.amountOfNeighbours++
      }
      if (e.target.Name == d.Name) { //if the target of the link is this node, amountOfNeighbours++
        d.amountOfNeighbours++
      }
    })
  })
  .attr("r", function(d) {
    return d.amountOfNeighbours * 2;
  })

Basically go through all the links for and check how many link to the selected node like so :

.each(function(d) {
  d.amountOfNeighbours = 0; //set an attribute
  link.each(function(e) {
    console.log(e)
    if (e.source.Name == d.Name) { //if the source of the link is this node, amountOfNeighbours++
      d.amountOfNeighbours++
    }
    if (e.target.Name == d.Name) { //if the target of the link is this node, amountOfNeighbours++
      d.amountOfNeighbours++
    }
  })
})

And then use this value : d.amountOfNeighbours as the radius. I multiplied it by 2 as the value was fairly small :)

 .attr("r", function(d) {
   return d.amountOfNeighbours * 2;
 })

Hope that helps