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February 1, 2017 21:20
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Ten Random Walk Bars
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<head> | |
<link href='https://fonts.googleapis.com/css?family=Lato' rel='stylesheet' type='text/css'> | |
<style> | |
</style> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> | |
<body> | |
<script> | |
var margin = {top: 30, right: 30, bottom: 50, left: 50}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.top - margin.bottom; | |
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 data = d3.range(0,10,1).map(function(d) { | |
return d3.randomUniform(0,100)(); | |
}) | |
var x = d3.scaleBand() | |
.domain(data.map(function(d,i) { return i;})) | |
.range([0,width]) | |
.padding(.1); | |
var y = d3.scaleLinear() | |
.domain([d3.min(data.map(function(d) { return d}))-10,d3.max(data.map(function(d) { return d}))+10]) | |
.range([height,0]); | |
var color = d3.scaleOrdinal(d3.schemeCategory10) | |
.domain(x.domain()); | |
var xAxis = d3.axisBottom(x); | |
var yAxis = d3.axisLeft(y); | |
svg.append("g") | |
.attr("class","axis x") | |
.attr("transform","translate(0," + height + ")") | |
.call(xAxis); | |
svg.append("g") | |
.attr("class","axis y") | |
.call(yAxis); | |
var duration = 250, | |
ease = d3.easeLinear; | |
var bars = svg.selectAll(".bar") | |
.data(data) | |
.enter() | |
.append("rect") | |
.attr("x", function(d,i) { return x(i)}) | |
.attr("y", function(d) { return y(d);}) | |
.attr("width", x.bandwidth()) | |
.attr("height", function(d) { return height - y(d);}) | |
.style("fill", function(d) { return color(d)}) | |
bars.transition() | |
.duration(duration) | |
.ease(ease) | |
.on("start", tick); | |
function tick(d,i) { | |
data[i] = data[i] + d3.randomUniform(-20,20)(); | |
y.domain([d3.min(data.map(function(d) { return d}))-10,d3.max(data.map(function(d) { return d}))+10]) | |
if(i==data.length-1) { | |
svg.select(".axis.y").transition() | |
.duration(duration) | |
.ease(ease) | |
.call(yAxis); | |
} | |
d3.active(this).attr("y", y(data[i])) | |
.attr("height", height - y(data[i])) | |
.on("end", function() { | |
if(i==data.length-1) { | |
bars.transition() | |
.duration(duration) | |
.ease(ease) | |
.on("start", tick); | |
} | |
}) | |
} | |
</script> |
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