Standalone Scatter Plot by curran

index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>D3 Example</title>
    <script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
    <link href='//fonts.googleapis.com/css?family=Poiret+One' rel='stylesheet' type='text/css'>
    <style>
    
      .axis text {
        font-family: 'Poiret One', cursive;
        font-size: 16pt;
      }
      .axis .label {
        font-size: 20pt;
      }

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

    </style>
  </head>
  <body>
    <script>
    
      var outerWidth = 960;
      var outerHeight = 500;
      var margin = { left: 60, top: 5, right: 10, bottom: 60 };
      var rMin = 2; // "r" stands for radius
      var rMax = 13;
      var xColumn = "sepal_length";
      var yColumn = "petal_length";
      var rColumn = "sepal_width";
      var colorColumn = "species";

      var xAxisLabelText = "Sepal Length (cm)";
      var xAxisLabelOffset = 48;

      var yAxisLabelText = "Petal Length (cm)";
      var yAxisLabelOffset = 30;

      var innerWidth  = outerWidth  - margin.left - margin.right;
      var innerHeight = outerHeight - margin.top  - margin.bottom;

      var svg = d3.select("body").append("svg")
        .attr("width", outerWidth)
        .attr("height", outerHeight);
      var g = svg.append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
      var xAxisG = g.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + innerHeight + ")")
      var xAxisLabel = xAxisG.append("text")
        .style("text-anchor", "middle")
        .attr("x", innerWidth / 2)
        .attr("y", xAxisLabelOffset)
        .attr("class", "label")
        .text(xAxisLabelText);
      var yAxisG = g.append("g")
        .attr("class", "y axis");
      var yAxisLabel = yAxisG.append("text")
        .style("text-anchor", "middle")
        .attr("transform", "translate(-" + yAxisLabelOffset + "," + (innerHeight / 2) + ") rotate(-90)")
        .attr("class", "label")
        .text(yAxisLabelText);

      var xScale = d3.scale.linear().range([0, innerWidth]);
      var yScale = d3.scale.linear().range([innerHeight, 0]);
      var rScale = d3.scale.linear().range([rMin, rMax]);
      var colorScale = d3.scale.ordinal()
        .range(["#0066FF", "#CC0066", "#33CC33"]);

      var xAxis = d3.svg.axis().scale(xScale).orient("bottom")
        .ticks(10)
        .tickFormat(d3.format("s"))
        .outerTickSize(0);
      var yAxis = d3.svg.axis().scale(yScale).orient("left")
        .ticks(5)
        .tickFormat(d3.format("s"))
        .outerTickSize(0);

      function render(data){
        xScale.domain(d3.extent(data, function (d){ return d[xColumn]; }));
        yScale.domain(d3.extent(data, function (d){ return d[yColumn]; }));
        rScale.domain(d3.extent(data, function (d){ return d[rColumn]; }));

        xAxisG.call(xAxis);
        yAxisG.call(yAxis);

        var circles = g.selectAll("circle").data(data);
        circles.enter().append("circle");
        circles
          .attr("cx",      function (d){ return       xScale(d[xColumn]);     })
          .attr("cy",      function (d){ return       yScale(d[yColumn]);     })
          .attr("r",       function (d){ return       rScale(d[rColumn]);     })
          .attr("fill",    function (d){ return   colorScale(d[colorColumn]); });

        circles.exit().remove();
      }

      function type(d){
        d.sepal_length = +d.sepal_length;
        d.sepal_width  = +d.sepal_width;
        d.petal_length = +d.petal_length;
        d.petal_width  = +d.petal_width;
        return d;
      }

      d3.csv("iris.csv", type, render);

    </script>
  </body>
</html>