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simple_tree_Titanic_Tree_NW.html
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<!DOCTYPE html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<style>
.node {
cursor: pointer;
}
.node circle {
stroke-width: 3px;
}
.node text {
font: 12px helvetica;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
</style>
</head>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 50, right: 100, bottom: 150, left: 50};
// collect all inputs
var tree_depth = 8;
var rules = {"0": [], "1": ["Sex: 0"], "2": ["Sex: 1"], "3": ["Sex: 0", "Pclass <= 2"], "4": ["Sex: 0", "Pclass > 2"], "5": ["Sex: 1", "Age <= 6.5"], "6": ["Sex: 1", "Age > 6.5"], "7": ["Sex: 1", "Age > 6.5", "Pclass <= 1"], "8": ["Sex: 1", "Age > 6.5", "Pclass > 1"], "9": ["Sex: 0", "Pclass > 2", "Fare <= 23.35"], "10": ["Sex: 0", "Pclass > 2", "Fare > 23.35"], "11": ["Sex: 1", "Age <= 6.5", "SibSp <= 2"], "12": ["Sex: 1", "SibSp > 2", "Age <= 6.5"], "13": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Fare <= 23.35"], "14": ["Sex: 0", "Age > 36.5", "Pclass > 2", "Fare <= 23.35"], "15": ["Sex: 1", "Age > 6.5", "Pclass <= 1", "Fare <= 26.144"], "16": ["Sex: 1", "Age > 6.5", "Pclass <= 1", "Fare > 26.144"], "17": ["Sex: 1", "Pclass <= 1", "Fare > 26.144", "6.5 < Age <= 53.0"], "18": ["Sex: 1", "Age > 53.0", "Pclass <= 1", "Fare > 26.144"], "19": ["Sex: 1", "Pclass <= 1", "6.5 < Age <= 53.0", "26.144 < Fare <= 27.135"], "20": ["Sex: 1", "Pclass <= 1", "Fare > 27.135", "6.5 < Age <= 53.0"], "21": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Fare <= 23.35", "Embarked_S: 0"], "22": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Fare <= 23.35", "Embarked_S: 1"], "23": ["Sex: 0", "Pclass > 2", "Age <= 29.75", "Fare <= 23.35", "Embarked_S: 0"], "24": ["Sex: 0", "Pclass > 2", "Fare <= 23.35", "Embarked_S: 0", "29.75 < Age <= 36.5"], "25": ["Sex: 0", "Pclass > 2", "Age <= 29.75", "Embarked_S: 0", "Fare <= 15.373"], "26": ["Sex: 0", "Pclass > 2", "Age <= 29.75", "Embarked_S: 0", "15.373 < Fare <= 23.35"], "27": ["Sex: 0", "Pclass > 2", "Age <= 29.75", "Embarked_S: 0", "Fare <= 13.935"], "28": ["Sex: 0", "Pclass > 2", "Age <= 29.75", "Embarked_S: 0", "13.935 < Fare <= 15.373"], "29": ["Sex: 0", "Pclass > 2", "Fare <= 23.35", "36.5 < Age <= 55.0"], "30": ["Sex: 0", "Age > 55.0", "Pclass > 2", "Fare <= 23.35"], "31": ["Sex: 0", "Parch <= 0", "Pclass > 2", "Fare > 23.35"], "32": ["Sex: 0", "Parch > 0", "Pclass > 2", "Fare > 23.35"], "33": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Embarked_S: 1", "Fare <= 10.825"], "34": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Embarked_S: 1", "10.825 < Fare <= 23.35"], "35": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Embarked_S: 1", "10.825 < Fare <= 17.6"], "36": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Embarked_S: 1", "17.6 < Fare <= 23.35"], "37": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Fare <= 7.762", "Embarked_S: 1"], "38": ["Sex: 0", "Pclass > 2", "Age <= 36.5", "Embarked_S: 1", "7.762 < Fare <= 10.825"]};
var num_node = 39;
var root = {"name": "Titanic_Tree_NW", "parent": "null", "predict": "Not Survived", "self": 0, "pos": "null", "value": [549, 342], "sample": 891, "color": "#aec7e8", "children": [{"name": "Sex: 0", "parent": 0, "predict": "Survived", "self": 1, "pos": "left", "value": [81, 233], "sample": 314, "color": "#ff7f0e", "children": [{"name": "Pclass <= 2", "parent": 1, "predict": "Survived", "self": 3, "pos": "left", "value": [9, 161], "sample": 170, "color": "#ff7f0e", "impurity": 0.1}, {"name": "Pclass > 2", "parent": 1, "predict": "Not Survived", "self": 4, "pos": "right", "value": [72, 72], "sample": 144, "color": "#aec7e8", "children": [{"name": "Fare <= 23.35", "parent": 4, "predict": "Survived", "self": 9, "pos": "left", "value": [48, 69], "sample": 117, "color": "#ff7f0e", "children": [{"name": "Age <= 36.5", "parent": 9, "predict": "Survived", "self": 13, "pos": "left", "value": [42, 68], "sample": 110, "color": "#ff7f0e", "children": [{"name": "Embarked_S: 0", "parent": 13, "predict": "Survived", "self": 21, "pos": "left", "value": [15, 38], "sample": 53, "color": "#ff7f0e", "children": [{"name": "Age <= 29.75", "parent": 21, "predict": "Survived", "self": 23, "pos": "left", "value": [13, 38], "sample": 51, "color": "#ff7f0e", "children": [{"name": "Fare <= 15.373", "parent": 23, "predict": "Survived", "self": 25, "pos": "left", "value": [13, 27], "sample": 40, "color": "#ff7f0e", "children": [{"name": "Fare <= 13.935", "parent": 25, "predict": "Survived", "self": 27, "pos": "left", "value": [6, 25], "sample": 31, "color": "#ff7f0e", "impurity": 0.312}, {"name": "Fare > 13.935", "parent": 25, "predict": "Not Survived", "self": 28, "pos": "right", "value": [7, 2], "sample": 9, "color": "#aec7e8", "impurity": 0.346}], "impurity": 0.439}, {"name": "Fare > 15.373", "parent": 23, "predict": "Survived", "self": 26, "pos": "right", "value": [0, 11], "sample": 11, "color": "#ff7f0e", "impurity": 0.0}], "impurity": 0.38}, {"name": "Age > 29.75", "parent": 21, "predict": "Not Survived", "self": 24, "pos": "right", "value": [2, 0], "sample": 2, "color": "#aec7e8", "impurity": 0.0}], "impurity": 0.406}, {"name": "Embarked_S: 1", "parent": 13, "predict": "Survived", "self": 22, "pos": "right", "value": [27, 30], "sample": 57, "color": "#ff7f0e", "children": [{"name": "Fare <= 10.825", "parent": 22, "predict": "Not Survived", "self": 33, "pos": "left", "value": [19, 14], "sample": 33, "color": "#aec7e8", "children": [{"name": "Fare <= 7.762", "parent": 33, "predict": "Survived", "self": 37, "pos": "left", "value": [1, 5], "sample": 6, "color": "#ff7f0e", "impurity": 0.278}, {"name": "Fare > 7.762", "parent": 33, "predict": "Not Survived", "self": 38, "pos": "right", "value": [18, 9], "sample": 27, "color": "#aec7e8", "impurity": 0.444}], "impurity": 0.489}, {"name": "Fare > 10.825", "parent": 22, "predict": "Survived", "self": 34, "pos": "right", "value": [8, 16], "sample": 24, "color": "#ff7f0e", "children": [{"name": "Fare <= 17.6", "parent": 34, "predict": "Survived", "self": 35, "pos": "left", "value": [2, 13], "sample": 15, "color": "#ff7f0e", "impurity": 0.231}, {"name": "Fare > 17.6", "parent": 34, "predict": "Not Survived", "self": 36, "pos": "right", "value": [6, 3], "sample": 9, "color": "#aec7e8", "impurity": 0.444}], "impurity": 0.444}], "impurity": 0.499}], "impurity": 0.472}, {"name": "Age > 36.5", "parent": 9, "predict": "Not Survived", "self": 14, "pos": "right", "value": [6, 1], "sample": 7, "color": "#aec7e8", "children": [{"name": "Age <= 55.0", "parent": 14, "predict": "Not Survived", "self": 29, "pos": "left", "value": [6, 0], "sample": 6, "color": "#aec7e8", "impurity": 0.0}, {"name": "Age > 55.0", "parent": 14, "predict": "Survived", "self": 30, "pos": "right", "value": [0, 1], "sample": 1, "color": "#ff7f0e", "impurity": 0.0}], "impurity": 0.245}], "impurity": 0.484}, {"name": "Fare > 23.35", "parent": 4, "predict": "Not Survived", "self": 10, "pos": "right", "value": [24, 3], "sample": 27, "color": "#aec7e8", "children": [{"name": "Parch <= 0", "parent": 10, "predict": "Survived", "self": 31, "pos": "left", "value": [0, 1], "sample": 1, "color": "#ff7f0e", "impurity": 0.0}, {"name": "Parch > 0", "parent": 10, "predict": "Not Survived", "self": 32, "pos": "right", "value": [24, 2], "sample": 26, "color": "#aec7e8", "impurity": 0.142}], "impurity": 0.198}], "impurity": 0.5}], "impurity": 0.383}, {"name": "Sex: 1", "parent": 0, "predict": "Not Survived", "self": 2, "pos": "right", "value": [468, 109], "sample": 577, "color": "#aec7e8", "children": [{"name": "Age <= 6.5", "parent": 2, "predict": "Survived", "self": 5, "pos": "left", "value": [8, 16], "sample": 24, "color": "#ff7f0e", "children": [{"name": "SibSp <= 2", "parent": 5, "predict": "Survived", "self": 11, "pos": "left", "value": [0, 15], "sample": 15, "color": "#ff7f0e", "impurity": 0.0}, {"name": "SibSp > 2", "parent": 5, "predict": "Not Survived", "self": 12, "pos": "right", "value": [8, 1], "sample": 9, "color": "#aec7e8", "impurity": 0.198}], "impurity": 0.444}, {"name": "Age > 6.5", "parent": 2, "predict": "Not Survived", "self": 6, "pos": "right", "value": [460, 93], "sample": 553, "color": "#aec7e8", "children": [{"name": "Pclass <= 1", "parent": 6, "predict": "Not Survived", "self": 7, "pos": "left", "value": [77, 43], "sample": 120, "color": "#aec7e8", "children": [{"name": "Fare <= 26.144", "parent": 7, "predict": "Not Survived", "self": 15, "pos": "left", "value": [10, 0], "sample": 10, "color": "#aec7e8", "impurity": 0.0}, {"name": "Fare > 26.144", "parent": 7, "predict": "Not Survived", "self": 16, "pos": "right", "value": [67, 43], "sample": 110, "color": "#aec7e8", "children": [{"name": "Age <= 53.0", "parent": 16, "predict": "Not Survived", "self": 17, "pos": "left", "value": [49, 40], "sample": 89, "color": "#aec7e8", "children": [{"name": "Fare <= 27.135", "parent": 17, "predict": "Survived", "self": 19, "pos": "left", "value": [2, 11], "sample": 13, "color": "#ff7f0e", "impurity": 0.26}, {"name": "Fare > 27.135", "parent": 17, "predict": "Not Survived", "self": 20, "pos": "right", "value": [47, 29], "sample": 76, "color": "#aec7e8", "impurity": 0.472}], "impurity": 0.495}, {"name": "Age > 53.0", "parent": 16, "predict": "Not Survived", "self": 18, "pos": "right", "value": [18, 3], "sample": 21, "color": "#aec7e8", "impurity": 0.245}], "impurity": 0.476}], "impurity": 0.46}, {"name": "Pclass > 1", "parent": 6, "predict": "Not Survived", "self": 8, "pos": "right", "value": [383, 50], "sample": 433, "color": "#aec7e8", "impurity": 0.204}], "impurity": 0.28}], "impurity": 0.306}], "impurity": 0.473};
var width = 1500, height = 1000;
var n_classes = 2;
// calculate tree gap
var tree_gap = (width - margin['left'] - margin['right']) * 1.0 / tree_depth;
// generate tree layout (horizonal)
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 + ')');
// color scale based on node impurity
var node_color_scale = d3.scale.linear()
.domain([1.0 / n_classes + 0.1, 0.])
.clamp(true);
var i = 0, duration = 750;
root.x0 = height / 2;
root.y0 = 0;
// update tree
update(root);
function update(source) {
// compute the tree layout
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// normalize for fixed-depth
nodes.forEach(function(d) {
d.y = d.depth * tree_gap;
});
// draw 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')
.on('click', click)
.attr('transform', function(d) {
return 'translate(' + source.y0 + ',' + source.x0 + ')';
})
.on('click', click)
.on('mouseover', mouseover)
.on('mouseout', mouseout);
// draw tree nodes
nodeEnter.append('circle')
.attr('r', 1e-6)
.style('fill', function(d) {
// d.color is the target color
node_color_scale.range(['#fff', d.color]);
return node_color_scale(d.impurity);
})
.style('stroke', function(d) {
return d.color;
})
.on('mouseover', function(d) {
if(!d.children) {
d3.select(this).style('fill', function(d){
return d.color;
});
recurse(d, d.color);
}
})
// when mouseout, recover everything
.on('mouseout', function(d) {
d3.select(this).style('fill', function(d) {
node_color_scale.range(['#fff', d.color]);
return node_color_scale(d.impurity);
}).attr('r', function(d){
// when the node is collapesd, increase the size
return d._children? 20 : 10;
});
d3.selectAll('.link')
.style('stroke-width', '2')
.style('stroke', '#ccc');
});
// add text on tree nodes
var text = nodeEnter.append('text')
.attr('x', 13)
.attr('dy', '-0.5em');
text.append('tspan')
.style('font-weight', 'bold')
.text(function(d) {
return d.name;
});
text.append('tspan')
.attr('x', 13)
.attr('y', 8)
.text(function(d) {
return 'Values: [' + d.value + ']';
});
text.append('tspan')
.attr('x', 13)
.attr('y', 22)
.text(function(d) {
return 'Predict: ' + d.predict;
});
nodeEnter.select('text').style('fill-opacity', 0);
// transform tree nodes to their initial positions
var nodeUpdate = node.transition()
.duration(duration)
.attr('transform', function(d) {
return 'translate(' + d.y + ',' + d.x + ')';
});
nodeUpdate.select('circle')
.attr('r', function(d){
return d._children? 20 : 10;
})
.style('stroke', function(d) {
return d.color;
})
.style('fill', function(d) {
node_color_scale.range(['#fff', d.color]);
return node_color_scale(d.impurity);
});
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();
// hide nodes and texts
nodeExit.select('circle').attr('r', 1e-6);
nodeExit.select('text').style('fill-opacity', 0);
// draw 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 the existing links 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;
});
}
// recursively color the links when hovering on a tree node
function recurse(d, color) {
d3.selectAll('.link').each(function(l) {
if(l.target === d) {
d3.select(this).style('stroke-width', 4).style('stroke', color);
}
});
if(d.parent) {
recurse(d.parent, color);
}
}
function mouseover(d) {
// if this node has no children nodes
if(!d.children) {
var rule = rules[d.self];
var append = ['Predict: ' + d.predict, 'Impurity: ' + d.impurity, ''];
rule = append.concat(rule);
var len = rule.length;
var info = d3.select(this).append('g').attr('class', 'hover');
var y0 = 35;
var rules_text = info.append('g').append('text').attr('y', y0);
for(var i = 1; i <= len; i++) {
rules_text.append('tspan')
.attr('x', 0)
.attr('y', y0 + i * 15)
.attr('text-anchor', 'left')
.style('font-weight', function(){
if(i <= 3) {
return 'bold';
}else{
return null;
}
})
.style('fill', function(){
if(i <= 3) {
return '#000';
}else{
return d.color;
}
})
.text(function() {
return rule[i - 1];
});
}
// draw the box
var bbox = info.node().getBBox();
var padding = 10;
var rect = d3.select(this).insert('rect', 'g')
.attr('class', 'info_bg')
.attr('x', bbox.x - padding)
.attr('y', bbox.y - padding)
.attr('width', bbox.width + padding * 2)
.attr('height', bbox.height + padding * 2)
.style('fill', 'white')
.style('stroke', d.color)
.style('stroke-width', 2);
// make the rule infomation on the first layer
this.parentNode.appendChild(this);
}
}
function mouseout(d) {
d3.select('.hover').remove();
d3.select('.info_bg').remove();
}
function click(d) {
if(d.children) {
d._children = d.children;
d.children = null;
}else {
d.children = d._children;
d._children = null;
}
update(d);
}
</script>
</body>
</html>