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@Pacsangon Pacsangon/chart.js forked from chrtze/chart.js
Created Aug 4, 2016

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Line Chart Example
var Chart = (function(window,d3) {
var svg, data, x, y, xAxis, yAxis, dim, chartWrapper, line, path, margin = {}, width, height, locator;
var breakPoint = 768;
d3.csv('data.csv', init); //load data, then initialize chart
//called once the data is loaded
function init(csv) {
data = csv;
//initialize scales
xExtent = d3.extent(data, function(d,i) { return new Date(d.date) });
yExtent = d3.extent(data, function(d,i) { return d.value });
x = d3.time.scale().domain(xExtent);
y = d3.scale.linear().domain(yExtent);
//initialize axis
xAxis = d3.svg.axis().orient('bottom');
yAxis = d3.svg.axis();
//the path generator for the line chart
line = d3.svg.line()
.x(function(d) { return x(new Date(d.date)) })
.y(function(d) { return y(d.value) });
//initialize svg
svg = d3.select('#chart')
.append('svg')
.style('pointer-events', 'none');
chartWrapper = svg
.append('g')
.style('pointer-events', 'all');
path = chartWrapper.append('path').datum(data).classed('line', true);
chartWrapper.append('g').classed('x axis', true);
chartWrapper.append('g').classed('y axis', true);
chartWrapper.on('touchmove', onTouchMove);
//add locator
locator = chartWrapper.append('circle')
.style('display', 'none')
.attr('r', 10)
.attr('fill', '#f00');
touchScale = d3.scale.linear();
//render the chart
render();
}
function render() {
//get dimensions based on window size
updateDimensions(window.innerWidth);
//update x and y scales to new dimensions
x.range([0, width]);
y.range([height, 0]);
touchScale.domain([0,width]).range([0,data.length-1]).clamp(true);
//update svg elements to new dimensions
svg
.attr('width', width + margin.right + margin.left)
.attr('height', height + margin.top + margin.bottom);
chartWrapper
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
//update the axis and line
xAxis.scale(x);
yAxis.scale(y).orient(window.innerWidth < breakPoint ? 'right' : 'left');
if(window.innerWidth < breakPoint) {
xAxis.ticks(d3.time.month, 2)
}
else {
xAxis.ticks(d3.time.month, 1)
}
svg.select('.x.axis')
.attr('transform', 'translate(0,' + height + ')')
.call(xAxis);
svg.select('.y.axis')
.call(yAxis);
path.attr('d', line);
renderLabels();
}
var labels = [
{
x: new Date('03-15-2014'),
y: .17,
text: 'Test Label 1',
orient: 'right'
},
{
x: new Date('11-20-2014'),
y: .24,
text: 'Test Label 2',
orient: 'left'
}
]
function renderLabels() {
var _labels = chartWrapper.selectAll('text.label');
if(_labels[0].length > 0) {
//labels already exist
_labels
.attr('x', function(d) { return x(d.x) })
.attr('y', function(d) { return y(d.y) })
}
else {
//append labels if function is called for the first time
_labels
.data(labels)
.enter()
.append('text')
.classed('label', true)
.attr('x', function(d) { return x(d.x) })
.attr('y', function(d) { return y(d.y) })
.style('text-anchor', function(d) { return d.orient == 'right' ? 'start' : 'end' })
.text(function(d) { return d.text });
}
}
function updateDimensions(winWidth) {
margin.top = 20;
margin.right = winWidth < breakPoint ? 0 : 50;
margin.left = winWidth < breakPoint ? 0 : 50;
margin.bottom = 50;
width = winWidth - margin.left - margin.right;
height = .7 * width;
}
function onTouchMove() {
var xPos = d3.touches(this)[0][0];
var d = data[~~touchScale(xPos)];
locator.attr({
cx : x(new Date(d.date)),
cy : y(d.value)
})
.style('display', 'block');
}
return {
render : render
}
})(window,d3);
window.addEventListener('resize', Chart.render);
var fs = require('fs');
var startDate = new Date('2014-1-1');
var endDate = new Date('2015-1-1');
var csv = 'date,value\n';
for(var i = startDate; i < endDate; startDate.setDate(startDate.getDate() + 10)) {
csv += '' + startDate.toString() + ',' + Math.random() + '\n';
}
fs.writeFileSync('data.csv', csv);
date value
Wed Jan 01 2014 00:00:00 GMT+0100 (CET) 0.505003142170608
Sat Jan 11 2014 00:00:00 GMT+0100 (CET) 0.5459181617479771
Tue Jan 21 2014 00:00:00 GMT+0100 (CET) 0.14592946274206042
Fri Jan 31 2014 00:00:00 GMT+0100 (CET) 0.7082753519061953
Mon Feb 10 2014 00:00:00 GMT+0100 (CET) 0.010393543168902397
Thu Feb 20 2014 00:00:00 GMT+0100 (CET) 0.6583312929142267
Sun Mar 02 2014 00:00:00 GMT+0100 (CET) 0.24273463618010283
Wed Mar 12 2014 00:00:00 GMT+0100 (CET) 0.15577656053937972
Sat Mar 22 2014 00:00:00 GMT+0100 (CET) 0.8833602059166878
Tue Apr 01 2014 00:00:00 GMT+0200 (CEST) 0.26687808078713715
Fri Apr 11 2014 00:00:00 GMT+0200 (CEST) 0.649613720132038
Mon Apr 21 2014 00:00:00 GMT+0200 (CEST) 0.4543698029592633
Thu May 01 2014 00:00:00 GMT+0200 (CEST) 0.7719218074344099
Sun May 11 2014 00:00:00 GMT+0200 (CEST) 0.5177543167956173
Wed May 21 2014 00:00:00 GMT+0200 (CEST) 0.9994703007396311
Sat May 31 2014 00:00:00 GMT+0200 (CEST) 0.7990491802338511
Tue Jun 10 2014 00:00:00 GMT+0200 (CEST) 0.2791274816263467
Fri Jun 20 2014 00:00:00 GMT+0200 (CEST) 0.00961384573020041
Mon Jun 30 2014 00:00:00 GMT+0200 (CEST) 0.17923940671607852
Thu Jul 10 2014 00:00:00 GMT+0200 (CEST) 0.5797557467594743
Sun Jul 20 2014 00:00:00 GMT+0200 (CEST) 0.41668077907525003
Wed Jul 30 2014 00:00:00 GMT+0200 (CEST) 0.26668014749884605
Sat Aug 09 2014 00:00:00 GMT+0200 (CEST) 0.9645155349280685
Tue Aug 19 2014 00:00:00 GMT+0200 (CEST) 0.9435918028466403
Fri Aug 29 2014 00:00:00 GMT+0200 (CEST) 0.4980645985342562
Mon Sep 08 2014 00:00:00 GMT+0200 (CEST) 0.9871973677072674
Thu Sep 18 2014 00:00:00 GMT+0200 (CEST) 0.8283164533786476
Sun Sep 28 2014 00:00:00 GMT+0200 (CEST) 0.6416109406854957
Wed Oct 08 2014 00:00:00 GMT+0200 (CEST) 0.6466128702741116
Sat Oct 18 2014 00:00:00 GMT+0200 (CEST) 0.7002710588276386
Tue Oct 28 2014 00:00:00 GMT+0100 (CET) 0.9069056580774486
Fri Nov 07 2014 00:00:00 GMT+0100 (CET) 0.6439003541599959
Mon Nov 17 2014 00:00:00 GMT+0100 (CET) 0.7253473403397948
Thu Nov 27 2014 00:00:00 GMT+0100 (CET) 0.22283505811356008
Sun Dec 07 2014 00:00:00 GMT+0100 (CET) 0.6578892532270402
Wed Dec 17 2014 00:00:00 GMT+0100 (CET) 0.14639883721247315
Sat Dec 27 2014 00:00:00 GMT+0100 (CET) 0.31333006569184363
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width" />
<title>D3 Line Chart</title>
<link rel="stylesheet" href="style.css">
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
</head>
<body>
<div id="chart"></div>
<script src="chart.js"></script>
</body>
</html>
body {
font: 12px sans-serif;
margin: 0;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
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