D3.js Error: <g> attribute transform: Expected number, "translate(NaN,NaN)"

I am trying to build a data visualization with d3 and I am running into the following error in my console.

Error: <g> attribute transform: Expected number, "translate(NaN,NaN)".

I have taken inspiration from this Plunker and tweaked a few things to make it compatible with my own data.

http://plnkr.co/edit/FiUrNHNMAXd7EBpr5uY5?p=preview&preview

Any help would be immensely appreciated.

My index.html is exactly the same.

<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css">

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.9/d3.js"></script>
</head>

<body>
<script src="script.js"></script>
</body>

</html>

Here is my script.js

var width = 960,
height = 500,
padding = 1.5, // separation between same-color nodes
clusterPadding = 6, // separation between different-color nodes
maxRadius = 100;
minRadius = 1;


d3.csv("modified_data_happy.csv", function(data) {
m = d3.max(data, function(d){return d.city_index});
console.log("m", m);
color = d3.scale.category10()
.domain(d3.range(m));
clusters = new Array(m);
dataset = data.map(function(d) {
var r = parseInt(d.Happy);
// var r = d.Happy;

var dta = {
  cluster: d.city_index,//group
  name: d.name,//label
  radius: r,//radius
  x: Math.cos(d.city_index / m * 2 * Math.PI) * 100 + width / 2 + Math.random(),
  y: Math.sin(d.city_index / m * 2 * Math.PI) * 100 + height / 2 + Math.random()
  };
  //add the one off the node inside teh cluster
  if (!clusters[d.city_index] || (d.Happy > clusters[d.city_index].radius)) 
  clusters[d.city_index] = dta;

  console.log("dta", dta);

  return dta;
  });
 console.log('dataset', dataset); 
 makeGraph(dataset);
 });


function makeGraph(nodes) {
 var force = d3.layout.force()
 .nodes(nodes)
 .size([width, height])
 .gravity(.02)
 .charge(0)
 .on("tick", tick)
 .start();

  var svg = d3.select("body").append("svg")
   .attr("width", width)
   .attr("height", height);

  var node = svg.selectAll("circle")
   .data(nodes)
   .enter().append("g").call(force.drag);

 node.append("circle")
  .style("fill", function(d) {
   return color(d.cluster);
  }).attr("r", function(d) {
  return d.Happy
  })

 node.append("text")
  .text(function(d) {
  return d.name;
  })
  .attr("dx", -10)
  .attr("dy", ".35em")
  .text(function(d) {
  return d.name
  })
  .style("stroke", "none");

function tick(e) {
  node.each(cluster(10 * e.alpha * e.alpha))
  .each(collide(.5))
  // .attr("transform", functon(d) {});
  .attr("transform", function(d) {
    var k = "translate(" + d.x + "," + d.y + ")";
    return k;
  })

 }

// Move d to be adjacent to the cluster node.
function cluster(alpha) {
return function(d) {
  var cluster = clusters[d.cluster];
  if (cluster === d) return;
  var x = d.x - cluster.x,
    y = d.y - cluster.y,
    l = Math.sqrt(x * x + y * y),
    r = d.Happy + cluster.radius;
  if (l != r) {
    l = (l - r) / l * alpha;
    d.x -= x *= l;
    d.y -= y *= l;
    cluster.x += x;
    cluster.y += y;
  }
  };
 }

 // Resolves collisions between d and all other circles.
 function collide(alpha) {
  var quadtree = d3.geom.quadtree(nodes);
  return function(d) {
  var r = d.Happy + maxRadius + Math.max(padding, clusterPadding),
    nx1 = d.x - r,
    nx2 = d.x + r,
    ny1 = d.y - r,
    ny2 = d.y + r;
  quadtree.visit(function(quad, x1, y1, x2, y2) {
    if (quad.point && (quad.point !== d)) {
      var x = d.x - quad.point.x,
        y = d.y - quad.point.y,
        l = Math.sqrt(x * x + y * y),
        r = d.Happy + quad.point.radius + (d.cluster === quad.point.cluster ? padding : 
       clusterPadding);
      if (l < r) {
        l = (l - r) / l * alpha;
        d.x -= x *= l;
        d.y -= y *= l;
        quad.point.x += x;
        quad.point.y += y;
      }
    }
    return x1 > nx2 || x2 < nx1 || y1 > ny2 || y2 < ny1;
  });
  };
  }
  }

My csv file looks like this (I replaced 'group' with 'city_index, and 'radius' with 'Happy'). That's it.

index |       name    | city_index         | Happy -----> Header Row
0     |       Joe     | 3                  | 60   ----->  Data Row

So that's where I am right now. I'm not sure why it's not working as the data structures I replaced the example with are the same. I tried removing the parser to no avail. I also tried modifying the "transform, translate" properties as well.

Any help would be immensely appreciated.