parallel coordinates

Built with blockbuilder.org

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

svg {
  font: 10px sans-serif;
}

.background path {
  fill: none;
  stroke: #ddd;
  shape-rendering: crispEdges;
}

.foreground path {
  fill: none;
}

.brush .extent {
  fill-opacity: .3;
  stroke: #fff;
  shape-rendering: crispEdges;
}

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

.axis text {
  text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 30, right: 10, bottom: 10, left: 5},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
  
var color_hash = {0 : ["Two-year schools", "#e02143"],
					    1 : ["Elite schools", "#b0b022"],
					    2 : ["For profit", "#69bf69"],
              3 : ["Four-year public", "#69bfbf"],
              4 : ["< two-year schools", "#0e0ebf"],
              5 : ["four-year private","#bf69bf"]
					  };

var x = d3.scale.ordinal().rangePoints([0, width], 1),
    y = {};

var line = d3.svg.line(),
    axis = d3.svg.axis().orient("left"),
    background,
    foreground;

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("mrc_table.csv", function(error, data) {

// Extract the list of dimensions and create a scale for each.
  x.domain(dimensions = d3.keys(data[0]).filter(function(d) {
    return d != "tier" && (y[d] = d3.scale.linear()
        .domain(d3.extent(data, function(p) { return +p[d]; }))
        .range([height, 0]));
  }));
  // Add grey background lines for context.
  background = svg.append("g")
      .attr("class", "background")
    .selectAll("path")
      .data(data)
    .enter().append("path")
      .attr("d", path);

// Add blue foreground lines for focus.
  foreground = svg.append("g")
      .attr("class", "foreground")
    .selectAll("path")
      .data(data)
    .enter().append("path")
      .attr("d", path).style("stroke",function(d) {if(d['tier'] === 'Two-year schools') {return "#e02143";} else if(d['tier'] === "Elite schools") {return "#b0b022";} else if(d['tier'] === "For profit") {return "#69bf69";} else if(d['tier'] === "Four-year public") {return "#69bfbf";} else if(d['tier'] === "< two-year schools") {return "#0e0ebf";} else {return "#bf69bf";}});

// Add a group element for each dimension.
  var g = svg.selectAll(".dimension")
      .data(dimensions)
    .enter().append("g")
      .attr("class", "dimension")
      .attr("transform", function(d) { return "translate(" + x(d) + ")"; });

// Add an axis and title.
  g.append("g")
      .attr("class", "axis")
      .each(function(d) { d3.select(this).call(axis.scale(y[d])); })
    .append("text")
      .style("text-anchor", "middle")
      .attr("y", -9)
      .text(function(d) { return d; });

// Add and store a brush for each axis.
  g.append("g")
      .attr("class", "brush")
      .each(function(d) { d3.select(this).call(y[d].brush = d3.svg.brush().y(y[d]).on("brush", brush)); })
    .selectAll("rect")
      .attr("x", -8)
      .attr("width", 16);
  
  	var legend = svg.append("g")
	  .attr("class", "legend")
	  .attr("x", width - 65)
	  .attr("y", 25)
	  .attr("height", 100)
	  .attr("width", 100);

legend.selectAll('g').data(data)
      .enter()
      .append('g')
      .each(function(d, i) {
        var g = d3.select(this);
        g.append("rect")
          .attr("x", width - 92)
          .attr("y", i*25)
          .attr("width", 10)
          .attr("height", 10)
          .attr("transform","translate(0,320)")
          .style("fill", color_hash[String(i)][1]);
        
        g.append("text")
          .attr("x", width - 82)
          .attr("y", i * 25 + 8)
          .attr("height",30)
          .attr("width",100)
        	.attr("transform","translate(0,320)")
          .style("fill", color_hash[String(i)][1])
          .text(color_hash[String(i)][0]);

});
});

// Returns the path for a given data point.
function path(d) {
  return line(dimensions.map(function(p) { return [x(p), y[p](d[p])]; }));
}

// Handles a brush event, toggling the display of foreground lines.
function brush() {
  var actives = dimensions.filter(function(p) { return !y[p].brush.empty(); }),
      extents = actives.map(function(p) { return y[p].brush.extent(); });
  foreground.style("display", function(d) {
    return actives.every(function(p, i) {
      return extents[i][0] <= d[p] && d[p] <= extents[i][1];
    }) ? null : "none";
  });
}

</script>

https://d3js.org/d3.v3.min.js