D3 Examples - Aid Payments over Time

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<!DOCTYPE html>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v3.js"></script>
<style>
​
body {
  font: 10px sans-serif;
}
​
.axis path, .axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
​
#header {
  position: absolute;
    top: 50px;
    left: 7%;
    font: 200 42px "Helvetica Neue";
}
​
#chart {
margin: 0 0% 0% 20%;
}
​
​
.legend {
    position: absolute;
    top: 350px;
    left: 7%;
    font: 400 16px "Helvetica Neue";
}
.axis text {
font: 400 14px "Helvetica Neue";
}
​
​
    footer {
    position: absolute;
    bottom: 10%;
    left: 7%;
    font: 200 16px "Helvetica Neue";
    }
</style>
<body>
<div id="header">
Gift Aid & Loan Payments <BR>
Over the course of the Fall 2012 semester
</div>
<div id="chart">
​
<script>
​
var format = d3.time.format("%m/%d/%y");
​
var margin = {top: 200, right: 30, bottom: 230, left: 60},
    width = 960 - margin.left - margin.right,
    height = 900 - margin.top - margin.bottom;
​
var x = d3.time.scale()
    .range([0, width]);
​
var y = d3.scale.linear()
    .range([height, 0]);
​
var z = ['#7570B3', '#E6AB02', '#66A61E', '#E7298A', '#D95F02'] ;
​
var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom")
    .ticks(d3.time.months);
​
var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left");
​
var stack = d3.layout.stack()
    .offset("zero")
    .values(function(d) { return d.values; })
    .x(function(d) { return d.date; })
    .y(function(d) { return d.value; });
​
var nest = d3.nest()
    .key(function(d) { return d.key; });
​
var area = d3.svg.area()
    .interpolate("basis") // there are other interpolation options that can be used here
    .x(function(d) { return x(d.date); })
    .y0(function(d) { return y(d.y0); })
    .y1(function(d) { return y(d.y0 + d.y); });
​
var svg = d3.select("#chart").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 + ")");
​
d3.csv("data.csv", function(data) {
  data.forEach(function(d) {
    d.date = format.parse(d.date);
    d.value = +d.value;
  });
​
  var layers = stack(nest.entries(data));
​
    var legend = d3.select("body").append("svg")
        .attr("width", 850)
        .attr("height", 200)
        .attr("class", "legend")
        .attr("transform", "translate(20, -600)") 
      .selectAll("g")
        .data(layers)
      .enter().append("g")  
        .attr("transform", function(d,i) { return "translate(0, " + ((i * 200) / 5 )  + ")" ;}); 
    
    legend.append("rect")
        .attr("width", 20)
        .attr("height", 20)
        .attr("fill", function(d, i) { return z[i]; })
        .style("fill-opacity", .85);
​
    legend.append("text")
        .attr("x", 28)
        .attr("y", 16)
        .text(function(d) { return d.key; })
        .attr("fill", function(d, i) { return z[i]; }); 
       
​
  x.domain(d3.extent(data, function(d) { return d.date; }));
  y.domain([0, d3.max(data, function(d) { return d.y0 + d.y; })]);
​
  svg.selectAll(".layer")
      .data(layers)
    .enter().append("path")
      .attr("class", "layer")
      .attr("d", function(d) { return area(d.values); })
      .style("fill", function(d, i) { return z[i]; })
      .style("fill-opacity", .85)
      .style("stroke-width", 5)
      .on('mouseover', function(d,i) { 
            d3.select(this)
                .style("fill-opacity", .65);
            })
      .on('mouseout', function(d,i) { 
            d3.select(this)
                .style("fill-opacity", .85);                
            });
​
  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);
​
  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis);
      
​
      
​
});
​
</script>
</div>
<footer>
<P>
<BR>    
Sara Quigley <BR>
January 18, 2013
<P>
</footer>
​
</body>
</html>
​
    