Wars II

Wars dataset from COW. Each path represents a war and associated circles represent the number of victims. Inspired from Valentina D'Efilippo's work

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.y.axis line {
  stroke: #777;
  stroke-dasharray: 2,2;
}

</style>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 20, left: 10},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var parseDate = d3.time.format("%m-%d-%Y").parse;

var x = d3.time.scale()
    .range([0, width - 50]);

var y = d3.scale.sqrt()
    .range([height, 0]);

var r = d3.scale.sqrt()
    .range([5, 30]);

var color = d3.scale.quantile()
    .range(["#fd8d3c","#fc4e2a","#e31a1c","#bd0026"]);

var xAxis = d3.svg.axis()
    .scale(x)
    .tickSize(6, 0)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .tickSize(30, 0)
    .orient("left");

var diag = d3.svg.diagonal()
    .source(function(d) { return {x: x(d.start),y: y(0)}; })
    .target(function(d) { return {x: x(d.end),y: y(d.duration)}; });

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 + ")");

d3.csv("data.csv", function(error, data) {
  if (error) throw error;

data.forEach(function(d) {
    d.start = parseDate(d.start);
    d.end = parseDate(d.end);
    d.duration = (d.end - d.start)/(1000*24*60*60*31*12);
    d.batDeath = +d.batDeath;
  });

data.sort(function(a,b) { return b.batDeath - a.batDeath; });
  
  x.domain([d3.min(data, function(d) { return d.start; }),d3.max(data, function(d) { return d.end; })]);
  y.domain([0,d3.max(data, function(d) { return d.duration; })]);
  r.domain(d3.extent(data, function(d) { return d.batDeath; }));
  color.domain(d3.extent(data, function(d) { return d.batDeath; }));

var war = svg.selectAll(".war")
    .data(data)
  .enter().append("g")
    .attr("class","war");

war.append("path")
      .attr("class","curves")
      .attr("d", diag)
      .attr("fill","none")
      .attr("stroke-width",1)
      .attr("stroke",function(d) { return color(d.batDeath); });
  
  war.append("circle")
      .attr("class","circle")
      .attr("r", function(d) { return r(d.batDeath); })
      .attr("cx",function(d) { return x(d.end)})
      .attr("cy",function(d) { return y(d.duration)})
      .attr("fill",function(d) { return color(d.batDeath)})
      .attr("stroke","white")
      .attr("stroke-width",1.5);

svg.append("g")
      .attr("class", "y axis")
      .attr("transform", "translate(" + width + ",0)")
      .call(yAxis)
    .append("text")
      .attr("x", 0)
      .attr("y", 10)
      .attr("transform", "rotate(-90)")
      .style("text-anchor", "end")
      .style("font-weight","bold")
      .text("Duration (years)");

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

});

</script>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js