silhouette vs wiggle
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August 29, 2015 14:26
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silhouette vs wiggle
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<title>Streamgraph</title> | |
<style> | |
body { | |
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
margin: auto; | |
position: relative; | |
width: 960px; | |
} | |
button { | |
position: absolute; | |
right: 10px; | |
} | |
button:first-of-type { | |
top: 10px; | |
} | |
button:last-of-type { | |
top: 24px; | |
} | |
</style> | |
<button onclick="transition()">Update</button> | |
<button id="offsetButton" onclick="changeType()">Wiggle</button> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
<script> | |
var n = 10, // number of layers | |
m = 50, // number of samples per layer | |
stack = d3.layout.stack().offset("silhouette"), | |
layers0 = stack(d3.range(n).map(function() { return bumpLayer(m); })), | |
layers1 = stack(d3.range(n).map(function() { return bumpLayer(m); })); | |
var width = 960, | |
height = 500; | |
var x = d3.scale.linear() | |
.domain([0, m - 1]) | |
.range([0, width]); | |
var y = d3.scale.linear() | |
.domain([0, d3.max(layers0.concat(layers1), function(layer) { return d3.max(layer, function(d) { return d.y0 + d.y; }); })]) | |
.range([height, 0]); | |
var color = d3.scale.linear() | |
.range(["#aad", "#556"]); | |
var area = d3.svg.area() | |
.x(function(d) { return x(d.x); }) | |
.y0(function(d) { return y(d.y0); }) | |
.y1(function(d) { return y(d.y0 + d.y); }); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
svg.selectAll("path") | |
.data(layers0) | |
.enter().append("path") | |
.attr("d", area) | |
.style("fill", function() { return color(Math.random()); }); | |
function transition() { | |
d3.selectAll("path") | |
.data(function() { | |
var d = layers1; | |
layers1 = layers0; | |
return layers0 = d; | |
}) | |
.transition() | |
.duration(2500) | |
.attr("d", area); | |
} | |
var otherType = { | |
"wiggle":"silhouette", | |
"silhouette": "wiggle" | |
}; | |
var current = "silhouette"; | |
function changeType(){ | |
var newOffset = otherType[current]; | |
stack.offset(newOffset); | |
d3.select('#offsetButton').text(current); | |
current = newOffset; | |
} | |
// Inspired by Lee Byron's test data generator. | |
function bumpLayer(n) { | |
function bump(a) { | |
var x = 1 / (.1 + Math.random()), | |
y = 2 * Math.random() - .5, | |
z = 10 / (.1 + Math.random()); | |
for (var i = 0; i < n; i++) { | |
var w = (i / n - y) * z; | |
a[i] += x * Math.exp(-w * w); | |
} | |
} | |
var a = [], i; | |
for (i = 0; i < n; ++i) a[i] = 0; | |
for (i = 0; i < 5; ++i) bump(a); | |
return a.map(function(d, i) { return {x: i, y: Math.max(0, d)}; }); | |
} | |
</script> |
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