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Reading Rainbow Backers Sanke Diagram, Sat May 31st 08:36 PM MDT
Raw
README.md

This is a snapshot of the Reading Rainbow Kickstarter Campaign as of 8:36 PM MDT on May 30th, 2014.

Using the D3.js sankey plugin to visualize the breakdown of backers. On the left hand side, the total number of backers. The middle set of rectangles represents reward level (I used this as the pledge amount, but people may have pledged more to cover shipping or because they felt like giving more...) and the right side represents the total amount pledged so far.

Total backers : 70,911

Total amount : 3,152,039

Raw
backers.json
{"nodes" : [
{"name" : "70,911 backers"},
{"name" : "$5"},
{"name" : "$10"},
{"name" : "$25"},
{"name" : "$35"},
{"name" : "$50"},
{"name" : "$75"},
{"name" : "$100"},
{"name" : "$110"},
{"name" : "$125"},
{"name" : "$150"},
{"name" : "$175"},
{"name" : "$200"},
{"name" : "$250"},
{"name" : "$350"},
{"name" : "$375"},
{"name" : "$400"},
{"name" : "$600"},
{"name" : "$700"},
{"name" : "$750"},
{"name" : "$800"},
{"name" : "$1,500"},
{"name" : "$2,500"},
{"name" : "$3,000"},
{"name" : "$3,500"},
{"name" : "$5,000"},
{"name" : "$10,000"},
{"name" : "Unknown Amount, no reward selected"},
{"name" : "$3,152,039 raised"}
],
"links" : [
{"source":0,"target":1,"value" : 14009},
{"source":0,"target":2,"value" : 9818},
{"source":0,"target":3,"value" : 6310},
{"source":0,"target":4,"value" : 4236},
{"source":0,"target":5,"value" : 17416},
{"source":0,"target":6,"value" : 2974},
{"source":0,"target":7,"value" : 2769},
{"source":0,"target":8,"value" : 750},
{"source":0,"target":9,"value" : 804},
{"source":0,"target":10,"value" : 34},
{"source":0,"target":11,"value" : 236},
{"source":0,"target":12,"value" : 1429},
{"source":0,"target":13,"value" : 688},
{"source":0,"target":14,"value" : 100},
{"source":0,"target":15,"value" : 221},
{"source":0,"target":16,"value" : 138},
{"source":0,"target":17,"value" : 30},
{"source":0,"target":18,"value" : 6},
{"source":0,"target":19,"value" : 46},
{"source":0,"target":20,"value" : 35},
{"source":0,"target":21,"value" : 10},
{"source":0,"target":22,"value" : 10},
{"source":0,"target":23,"value" : 1},
{"source":0,"target":24,"value" : 10},
{"source":0,"target":25,"value" : 5},
{"source":0,"target":26,"value" : 6},
{"source":0,"target":27,"value" : 8815},
{"source":1,"target":28,"value" : 14009},
{"source":2,"target":28,"value" : 9818},
{"source":3,"target":28,"value" : 6310},
{"source":4,"target":28,"value" : 4236},
{"source":5,"target":28,"value" : 17416},
{"source":6,"target":28,"value" : 2979},
{"source":7,"target":28,"value" : 2769},
{"source":8,"target":28,"value" : 750},
{"source":9,"target":28,"value" : 804},
{"source":10,"target":28,"value" : 34},
{"source":11,"target":28,"value" : 236},
{"source":12,"target":28,"value" : 1429},
{"source":13,"target":28,"value" : 688},
{"source":14,"target":28,"value" : 100},
{"source":15,"target":28,"value" : 221},
{"source":16,"target":28,"value" : 138},
{"source":17,"target":28,"value" : 30},
{"source":18,"target":28,"value" : 6},
{"source":19,"target":28,"value" : 46},
{"source":20,"target":28,"value" : 35},
{"source":21,"target":28,"value" : 10},
{"source":22,"target":28,"value" : 10},
{"source":23,"target":28,"value" : 1},
{"source":24,"target":28,"value" : 10},
{"source":25,"target":28,"value" : 5},
{"source":26,"target":28,"value" : 6},
{"source":27,"target":28,"value" : 8815}
]
}
Raw
index.html
<!Doctype html>
<style>
body {
font: 10px sans-serif;
}
.node rect {
cursor: move;
fill-opacity: .9;
shape-rendering: crispEdges;
}
.node text {
pointer-events: none;
text-shadow: 0 1px 0 #fff;
}
.link {
fill: none;
stroke: #000;
stroke-opacity: .2;
}
.link:hover {
stroke-opacity: .5;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="sankey.js"></script>
<script type="text/javascript">
var margin = {top: 1, right: 1, bottom: 6, left: 1},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var formatNumber = d3.format("d"),
format = function(d) { return formatNumber(d) + " backers"; },
color = d3.scale.category20();
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var sankey = d3.sankey()
.nodeWidth(15)
.nodePadding(10)
.size([width, height]);
var path = sankey.link();
d3.json("backers.json", function(backers) {
sankey
.nodes(backers.nodes)
.links(backers.links)
.layout(32);
var link = svg.append("g").selectAll(".link")
.data(backers.links)
.enter().append("path")
.attr("class", "link")
.attr("d", path)
.style("stroke-width", function(d) { return Math.max(1, d.dy); })
.sort(function(a, b) { return b.dy - a.dy; });
link.append("title")
.text(function(d) { return format(d.value); });
var node = svg.append("g").selectAll(".node")
.data(backers.nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
.call(d3.behavior.drag()
.origin(function(d) { return d; })
.on("dragstart", function() { this.parentNode.appendChild(this); })
.on("drag", dragmove));
node.append("rect")
.attr("height", function(d) { return d.dy; })
.attr("width", sankey.nodeWidth())
.style("fill", function(d) { return d.color = color(d.name.replace(/ .*/, "")); })
.style("stroke", function(d) { return d3.rgb(d.color).darker(2); })
.append("title")
.text(function(d) { return d.name + "\n" + format(d.value); });
node.append("text")
.attr("x", -6)
.attr("y", function(d) { return d.dy / 2; })
.attr("dy", ".35em")
.attr("text-anchor", "end")
.attr("transform", null)
.text(function(d) { return d.name; })
.filter(function(d) { return d.x < width / 2; })
.attr("x", 6 + sankey.nodeWidth())
.attr("text-anchor", "start");
function dragmove(d) {
d3.select(this).attr("transform", "translate(" + d.x + "," + (d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))) + ")");
sankey.relayout();
link.attr("d", path);
}
});
</script>
Raw
sankey.js
d3.sankey = function() {
var sankey = {},
nodeWidth = 24,
nodePadding = 8,
size = [1, 1],
nodes = [],
links = [];
sankey.nodeWidth = function(_) {
if (!arguments.length) return nodeWidth;
nodeWidth = +_;
return sankey;
};
sankey.nodePadding = function(_) {
if (!arguments.length) return nodePadding;
nodePadding = +_;
return sankey;
};
sankey.nodes = function(_) {
if (!arguments.length) return nodes;
nodes = _;
return sankey;
};
sankey.links = function(_) {
if (!arguments.length) return links;
links = _;
return sankey;
};
sankey.size = function(_) {
if (!arguments.length) return size;
size = _;
return sankey;
};
sankey.layout = function(iterations) {
computeNodeLinks();
computeNodeValues();
computeNodeBreadths();
computeNodeDepths(iterations);
computeLinkDepths();
return sankey;
};
sankey.relayout = function() {
computeLinkDepths();
return sankey;
};
sankey.link = function() {
var curvature = .5;
function link(d) {
var x0 = d.source.x + d.source.dx,
x1 = d.target.x,
xi = d3.interpolateNumber(x0, x1),
x2 = xi(curvature),
x3 = xi(1 - curvature),
y0 = d.source.y + d.sy + d.dy / 2,
y1 = d.target.y + d.ty + d.dy / 2;
return "M" + x0 + "," + y0
+ "C" + x2 + "," + y0
+ " " + x3 + "," + y1
+ " " + x1 + "," + y1;
}
link.curvature = function(_) {
if (!arguments.length) return curvature;
curvature = +_;
return link;
};
return link;
};
// Populate the sourceLinks and targetLinks for each node.
// Also, if the source and target are not objects, assume they are indices.
function computeNodeLinks() {
nodes.forEach(function(node) {
node.sourceLinks = [];
node.targetLinks = [];
});
links.forEach(function(link) {
var source = link.source,
target = link.target;
if (typeof source === "number") source = link.source = nodes[link.source];
if (typeof target === "number") target = link.target = nodes[link.target];
source.sourceLinks.push(link);
target.targetLinks.push(link);
});
}
// Compute the value (size) of each node by summing the associated links.
function computeNodeValues() {
nodes.forEach(function(node) {
node.value = Math.max(
d3.sum(node.sourceLinks, value),
d3.sum(node.targetLinks, value)
);
});
}
// Iteratively assign the breadth (x-position) for each node.
// Nodes are assigned the maximum breadth of incoming neighbors plus one;
// nodes with no incoming links are assigned breadth zero, while
// nodes with no outgoing links are assigned the maximum breadth.
function computeNodeBreadths() {
var remainingNodes = nodes,
nextNodes,
x = 0;
while (remainingNodes.length) {
nextNodes = [];
remainingNodes.forEach(function(node) {
node.x = x;
node.dx = nodeWidth;
node.sourceLinks.forEach(function(link) {
nextNodes.push(link.target);
});
});
remainingNodes = nextNodes;
++x;
}
//
moveSinksRight(x);
scaleNodeBreadths((size[0] - nodeWidth) / (x - 1));
}
function moveSourcesRight() {
nodes.forEach(function(node) {
if (!node.targetLinks.length) {
node.x = d3.min(node.sourceLinks, function(d) { return d.target.x; }) - 1;
}
});
}
function moveSinksRight(x) {
nodes.forEach(function(node) {
if (!node.sourceLinks.length) {
node.x = x - 1;
}
});
}
function scaleNodeBreadths(kx) {
nodes.forEach(function(node) {
node.x *= kx;
});
}
function computeNodeDepths(iterations) {
var nodesByBreadth = d3.nest()
.key(function(d) { return d.x; })
.sortKeys(d3.ascending)
.entries(nodes)
.map(function(d) { return d.values; });
//
initializeNodeDepth();
resolveCollisions();
for (var alpha = 1; iterations > 0; --iterations) {
relaxRightToLeft(alpha *= .99);
resolveCollisions();
relaxLeftToRight(alpha);
resolveCollisions();
}
function initializeNodeDepth() {
var ky = d3.min(nodesByBreadth, function(nodes) {
return (size[1] - (nodes.length - 1) * nodePadding) / d3.sum(nodes, value);
});
nodesByBreadth.forEach(function(nodes) {
nodes.forEach(function(node, i) {
node.y = i;
node.dy = node.value * ky;
});
});
links.forEach(function(link) {
link.dy = link.value * ky;
});
}
function relaxLeftToRight(alpha) {
nodesByBreadth.forEach(function(nodes, breadth) {
nodes.forEach(function(node) {
if (node.targetLinks.length) {
var y = d3.sum(node.targetLinks, weightedSource) / d3.sum(node.targetLinks, value);
node.y += (y - center(node)) * alpha;
}
});
});
function weightedSource(link) {
return center(link.source) * link.value;
}
}
function relaxRightToLeft(alpha) {
nodesByBreadth.slice().reverse().forEach(function(nodes) {
nodes.forEach(function(node) {
if (node.sourceLinks.length) {
var y = d3.sum(node.sourceLinks, weightedTarget) / d3.sum(node.sourceLinks, value);
node.y += (y - center(node)) * alpha;
}
});
});
function weightedTarget(link) {
return center(link.target) * link.value;
}
}
function resolveCollisions() {
nodesByBreadth.forEach(function(nodes) {
var node,
dy,
y0 = 0,
n = nodes.length,
i;
// Push any overlapping nodes down.
nodes.sort(ascendingDepth);
for (i = 0; i < n; ++i) {
node = nodes[i];
dy = y0 - node.y;
if (dy > 0) node.y += dy;
y0 = node.y + node.dy + nodePadding;
}
// If the bottommost node goes outside the bounds, push it back up.
dy = y0 - nodePadding - size[1];
if (dy > 0) {
y0 = node.y -= dy;
// Push any overlapping nodes back up.
for (i = n - 2; i >= 0; --i) {
node = nodes[i];
dy = node.y + node.dy + nodePadding - y0;
if (dy > 0) node.y -= dy;
y0 = node.y;
}
}
});
}
function ascendingDepth(a, b) {
return a.y - b.y;
}
}
function computeLinkDepths() {
nodes.forEach(function(node) {
node.sourceLinks.sort(ascendingTargetDepth);
node.targetLinks.sort(ascendingSourceDepth);
});
nodes.forEach(function(node) {
var sy = 0, ty = 0;
node.sourceLinks.forEach(function(link) {
link.sy = sy;
sy += link.dy;
});
node.targetLinks.forEach(function(link) {
link.ty = ty;
ty += link.dy;
});
});
function ascendingSourceDepth(a, b) {
return a.source.y - b.source.y;
}
function ascendingTargetDepth(a, b) {
return a.target.y - b.target.y;
}
}
function center(node) {
return node.y + node.dy / 2;
}
function value(link) {
return link.value;
}
return sankey;
};
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