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linechart-wateruse.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>D3 Basics</title>
<script type="text/javascript" src="../d3.v3.js"></script>
<!-- <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>-->
<LINK href="style2.css" rel="stylesheet" type="text/css">
<!--
<style>
body{
font:12px arial;
}
h1,h4{
margin-left:50px;
}
.axis line, .axis path{
fill:none;
stroke:black;
}
#tooltip{
position:absolute;
background:whitesmoke;
padding:2px 6px;
border-radius:5px;
font-weight:bold;
}
.hide{
display:none;
}
path:hover{
cursor:pointer;
stroke:orange;
}
.high{
stroke:red;
}
.low{
stroke:green;
}
.axis path,
.axis line {
fill: none;
stroke: #cccccc;;
shape-rendering: crispEdges;
}
.axis text {
font-family: "Open Sans",Arial,sans-serif;
font-size: 11px;
}
</style>
-->
</head>
<body>
<h3>Water Use</h3>
<p>Total water use (kgal) by department, 2013 - 2014</p>
<div id="tooltip" class="hide">
</div>
<script>
window.onload = function(){
// margin convention
var margin = {
top:20,
right:30,
bottom:20,
left:80
}
var width = 300-margin.left-margin.right;
var height = 300 - margin.top - margin.bottom;
// basic variables
var svg = d3.select("body")
.append("svg")
.attr({
"width": width+margin.left+margin.right,
"height": height + margin.top + margin.bottom
})
.append("g")
.attr("transform", "translate("+ margin.left + "," + margin.top + ")")
// scales and axis
var xScale = d3.time.scale()
.range([0,width]);
var yScale = d3.scale.linear()
.range([0,height]);
// time format
var dateFormat = d3.time.format("%Y");
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.ticks(2)
.tickFormat(function(d){
return dateFormat(d)
});
// var yAxis = d3.svg.axis()
// .scale(yScale)
// .orient("left")
// .tickFormat(function(d){
// return d;
// })
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left");
// load data
d3.csv("data/Depts-Water-Use.csv", function(data){
// reconstruct data
var years = d3.range("2013","2015");
console.log(years);
years = years.map(function(d){
return d+"";
})
var dataset = [];
for(var i=0;i<data.length;i++){
dataset[i] = {
Dept: data[i].Dept,
rates:[]
}
for(var j=0;j<years.length;j++){
if(data[i][years[j]]){
dataset[i].rates.push({
year: years[j],
rate: data[i][years[j]]
})
}
}
}
// set domains
xScale.domain([
d3.min(years, function(d){
return dateFormat.parse(d)
}),
d3.max(years, function(d){
return dateFormat.parse(d)
})
])
yScale.domain([
d3.max(dataset,function(d){
return d3.max(d.rates, function(d){
return +d.rate;
})
}),
d3.min(dataset,function(d){
return d3.max(d.rates, function(d){
return (+d.rate) - 15 ;
})
})
])
// render data
var groups = svg.selectAll("g")
.data(dataset)
.enter()
.append("g");
groups.attr("name",function(d){
return d.Dept;
})
console.log(groups);
// line generator
var line = d3.svg.line()
.x(function(d){
return xScale(dateFormat.parse(d.year))
})
.y(function(d){
return yScale(+d.rate)
})
// draw line
groups.selectAll("path")
.data(function(d){
return [d.rates]; //use arrays to draw lines
})
.enter()
.append("path")
.attr("d", line) //use line generator
.attr({
"class":"line",
"fill":"none",
"stroke":"steelblue",
"stroke-width":"2"
})
.classed("high",function(d){
var max = d3.max(d, function(d){
return d.rate;
})
if(max > 5000000){
return true;
}else {
return false;
}
})
.classed("low",function(d){
var max = d3.max(d, function(d){
return d.rate;
})
if(max < 1000000){
return true;
}else {
return false;
}
})
.on("mouseover",function(d){
var xPos = parseFloat(width+margin.left+margin.right)-10;
var lastRate = +d[d.length-1].rate;
var yPos = parseFloat(yScale(lastRate)) + 90;
var deptName = d3.select(this.parentNode).attr("name")
d3.select("#tooltip")
.style("left", xPos+"px")
.style("top", yPos+"px")
.html("<p>"+deptName+"</p>")
.classed("hide",false)
})
.on("mouseout",function(d){
d3.select("#tooltip").classed("hide",true)
})
//axe
svg.append("g")
.attr("class","x axis")
.attr("transform", "translate(0,"+ height + ")")
.call(xAxis)
svg.append("g")
.attr("class","y axis")
.call(yAxis)
})
};
</script>
</body>
</html>