D3 Examples - scatterplot (using iris dataset)

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
body {
  font: 10px sans-serif;
}
​
.axis path, .axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
​
.dot {
  stroke: #000;
}
​
</style>
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
​
var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 480 - margin.left - margin.right,
    height = 250 - margin.top - margin.bottom;
​
var x = d3.scaleLinear()
    .range([0, width]);
​
var y = d3.scaleLinear()
    .range([height, 0]);
​
 var r = d3.scaleSqrt()
      .range([2, 10]);
  
 var color = d3.scaleOrdinal(d3.schemeCategory20);
  
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('iris.csv', function(error, data){
​
  data.forEach(function(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;
    });
​
    x.domain(d3.extent(data, function(d){
        return d.sepal_length;
    })).nice();
​
    y.domain(d3.extent(data, function(d){
        return d.sepal_width;
    })).nice();
​
    r.domain(d3.extent(data, function(d){
        return d.petal_length;
    })).nice();
  
 
    svg.selectAll("circle")
    .data(data)
  .enter().append("circle")
        .attr("cx", function(d) { return x(d.sepal_length); })
        .attr("cy", function(d) { return y(d.sepal_width); })
    .attr("r", function(d) { return r(d.petal_length); })
    .style("fill", function(d) { return color(d.species); })
​
     var xAxis = d3.axisBottom()
        .scale(x);
​
    var yAxis = d3.axisLeft()
        .scale(y);
​
    svg.append("g")
          .attr("class", "x axis")
          .attr("transform", "translate(0," + height + ")")
          .call(xAxis)
​
    svg.append("g")
          .attr("class", "y axis")
​
          .call(yAxis)
    
    
});
  
</script>
    