ajschumacher/README.md

## README.md

      
    Raw
  

              README.md
            
          
    This is Bostock's interactive Reingold-Tilford Tree with data representing the rules of a simple sklearn decision tree. Click on nodes to expand or collapse.
For more, see the complete write-up.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

.node {
  cursor: pointer;
}

.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 1.5px;
}

.node text {
  font: 10px sans-serif;
}

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 1.5px;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 20, right: 120, bottom: 20, left: 180},
    width = 960 - margin.right - margin.left,
    height = 480 - margin.top - margin.bottom;

var i = 0,
    duration = 750,
    root;

var tree = d3.layout.tree()
    .size([height, width]);

var diagonal = d3.svg.diagonal()
    .projection(function(d) { return [d.y, d.x]; });

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.right + margin.left)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

d3.json("/ajschumacher/raw/65eda1df2b0dd2cf616f/structure.json", function(error, flare) {
  if (error) throw error;

  root = flare;
  root.x0 = height / 2;
  root.y0 = 0;

  function collapse(d) {
    if (d.children) {
      d._children = d.children;
      d._children.forEach(collapse);
      d.children = null;
    }
  }

  root.children.forEach(collapse);
  update(root);
});

d3.select(self.frameElement).style("height", "480px");

function update(source) {

  // Compute the new tree layout.
  var nodes = tree.nodes(root).reverse(),
      links = tree.links(nodes);

  // Normalize for fixed-depth.
  nodes.forEach(function(d) { d.y = d.depth * 180; });

  // Update the nodes…
  var node = svg.selectAll("g.node")
      .data(nodes, function(d) { return d.id || (d.id = ++i); });

  // Enter any new nodes at the parent's previous position.
  var nodeEnter = node.enter().append("g")
      .attr("class", "node")
      .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
      .on("click", click);

  nodeEnter.append("circle")
      .attr("r", 1e-6)
      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

  nodeEnter.append("text")
      .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
      .attr("dy", ".35em")
      .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
      .text(function(d) { return d.name; })
      .style("fill-opacity", 1e-6);

  // Transition nodes to their new position.
  var nodeUpdate = node.transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

  nodeUpdate.select("circle")
      .attr("r", 4.5)
      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

  nodeUpdate.select("text")
      .style("fill-opacity", 1);

  // Transition exiting nodes to the parent's new position.
  var nodeExit = node.exit().transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
      .remove();

  nodeExit.select("circle")
      .attr("r", 1e-6);

  nodeExit.select("text")
      .style("fill-opacity", 1e-6);

  // Update the links…
  var link = svg.selectAll("path.link")
      .data(links, function(d) { return d.target.id; });

  // Enter any new links at the parent's previous position.
  link.enter().insert("path", "g")
      .attr("class", "link")
      .attr("d", function(d) {
        var o = {x: source.x0, y: source.y0};
        return diagonal({source: o, target: o});
      });

  // Transition links to their new position.
  link.transition()
      .duration(duration)
      .attr("d", diagonal);

  // Transition exiting nodes to the parent's new position.
  link.exit().transition()
      .duration(duration)
      .attr("d", function(d) {
        var o = {x: source.x, y: source.y};
        return diagonal({source: o, target: o});
      })
      .remove();

  // Stash the old positions for transition.
  nodes.forEach(function(d) {
    d.x0 = d.x;
    d.y0 = d.y;
  });
}

// Toggle children on click.
function click(d) {
  if (d.children) {
    d._children = d.children;
    d.children = null;
  } else {
    d.children = d._children;
    d._children = null;
  }
  update(d);
}

</script>

## structure.json
{
  "name": "petal length (cm) > 2.45000004768",
  "children": [
    {
      "name": "petal width (cm) > 1.75",
      "children": [
        {
          "name": "petal length (cm) > 4.85000038147",
          "children": [
            {
              "name": "0 of setosa, 0 of versicolor, 43 of virginica"
            },
            {
              "name": "0 of setosa, 1 of versicolor, 2 of virginica"
            }
          ]
        },
        {
          "name": "petal length (cm) > 4.94999980927",
          "children": [
            {
              "name": "0 of setosa, 2 of versicolor, 4 of virginica"
            },
            {
              "name": "0 of setosa, 47 of versicolor, 1 of virginica"
            }
          ]
        }
      ]
    },
    {
      "name": "50 of setosa, 0 of versicolor, 0 of virginica"
    }
  ]
}
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	.node {
	cursor: pointer;
	}

	.node circle {
	fill: #fff;
	stroke: steelblue;
	stroke-width: 1.5px;
	}

	.node text {
	font: 10px sans-serif;
	}

	.link {
	fill: none;
	stroke: #ccc;
	stroke-width: 1.5px;
	}

	</style>
	<body>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script>

	var margin = {top: 20, right: 120, bottom: 20, left: 180},
	width = 960 - margin.right - margin.left,
	height = 480 - margin.top - margin.bottom;

	var i = 0,
	duration = 750,
	root;

	var tree = d3.layout.tree()
	.size([height, width]);

	var diagonal = d3.svg.diagonal()
	.projection(function(d) { return [d.y, d.x]; });

	var svg = d3.select("body").append("svg")
	.attr("width", width + margin.right + margin.left)
	.attr("height", height + margin.top + margin.bottom)
	.append("g")
	.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

	d3.json("/ajschumacher/raw/65eda1df2b0dd2cf616f/structure.json", function(error, flare) {
	if (error) throw error;

	root = flare;
	root.x0 = height / 2;
	root.y0 = 0;

	function collapse(d) {
	if (d.children) {
	d._children = d.children;
	d._children.forEach(collapse);
	d.children = null;
	}
	}

	root.children.forEach(collapse);
	update(root);
	});

	d3.select(self.frameElement).style("height", "480px");

	function update(source) {

	// Compute the new tree layout.
	var nodes = tree.nodes(root).reverse(),
	links = tree.links(nodes);

	// Normalize for fixed-depth.
	nodes.forEach(function(d) { d.y = d.depth * 180; });

	// Update the nodes…
	var node = svg.selectAll("g.node")
	.data(nodes, function(d) { return d.id \|\| (d.id = ++i); });

	// Enter any new nodes at the parent's previous position.
	var nodeEnter = node.enter().append("g")
	.attr("class", "node")
	.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
	.on("click", click);

	nodeEnter.append("circle")
	.attr("r", 1e-6)
	.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

	nodeEnter.append("text")
	.attr("x", function(d) { return d.children \|\| d._children ? -10 : 10; })
	.attr("dy", ".35em")
	.attr("text-anchor", function(d) { return d.children \|\| d._children ? "end" : "start"; })
	.text(function(d) { return d.name; })
	.style("fill-opacity", 1e-6);

	// Transition nodes to their new position.
	var nodeUpdate = node.transition()
	.duration(duration)
	.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

	nodeUpdate.select("circle")
	.attr("r", 4.5)
	.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

	nodeUpdate.select("text")
	.style("fill-opacity", 1);

	// Transition exiting nodes to the parent's new position.
	var nodeExit = node.exit().transition()
	.duration(duration)
	.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
	.remove();

	nodeExit.select("circle")
	.attr("r", 1e-6);

	nodeExit.select("text")
	.style("fill-opacity", 1e-6);

	// Update the links…
	var link = svg.selectAll("path.link")
	.data(links, function(d) { return d.target.id; });

	// Enter any new links at the parent's previous position.
	link.enter().insert("path", "g")
	.attr("class", "link")
	.attr("d", function(d) {
	var o = {x: source.x0, y: source.y0};
	return diagonal({source: o, target: o});
	});

	// Transition links to their new position.
	link.transition()
	.duration(duration)
	.attr("d", diagonal);

	// Transition exiting nodes to the parent's new position.
	link.exit().transition()
	.duration(duration)
	.attr("d", function(d) {
	var o = {x: source.x, y: source.y};
	return diagonal({source: o, target: o});
	})
	.remove();

	// Stash the old positions for transition.
	nodes.forEach(function(d) {
	d.x0 = d.x;
	d.y0 = d.y;
	});
	}

	// Toggle children on click.
	function click(d) {
	if (d.children) {
	d._children = d.children;
	d.children = null;
	} else {
	d.children = d._children;
	d._children = null;
	}
	update(d);
	}

	</script>
	{
	"name": "petal length (cm) > 2.45000004768",
	"children": [
	{
	"name": "petal width (cm) > 1.75",
	"children": [
	{
	"name": "petal length (cm) > 4.85000038147",
	"children": [
	{
	"name": "0 of setosa, 0 of versicolor, 43 of virginica"
	},
	{
	"name": "0 of setosa, 1 of versicolor, 2 of virginica"
	}
	]
	},
	{
	"name": "petal length (cm) > 4.94999980927",
	"children": [
	{
	"name": "0 of setosa, 2 of versicolor, 4 of virginica"
	},
	{
	"name": "0 of setosa, 47 of versicolor, 1 of virginica"
	}
	]
	}
	]
	},
	{
	"name": "50 of setosa, 0 of versicolor, 0 of virginica"
	}
	]
	}