D3 Examples - Scatterplot GHG (total and per capita)

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Module 3 exercice</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
            
            <style type="text/css">
            
            body {
                background-color: #EBEFEB;
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            h {
                font-size: 30px;
                font-family: arial;
                margin: 2;
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            p {
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                margin: 15px 0 0 0;
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            svg {
                background-color: #EBEFEB;
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            circle:hover {
                fill: #635C5C;
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            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
 
            }
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            .axis text {
                font-family: arial;
                font-size: 12px;
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            }
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        </style>
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    </head>
    <body>
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<h1>GHG emissions in the world in 2012<h1/>
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    <p>Countries are ranked by total greenhouse gases (GHG) emissions (tonnes of CO2 equivalent), and per capita (thousand kgs). Based on <a href="https://stats.oecd.org/">OECD data.<a/></p>
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    <p>Overall, we can see that the United States are far away from the others, and Australia has a high level of greenhouse gas emissions per person, but a low total emissions. </p>
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<script type="text/javascript">
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var w = 900;
var h = 600;
var padding = [7, 10, 30, 95 ]; //top - 0, right - 1, bottom - 2, left - 3
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var xScale = d3.scale.linear()
                         .range([ padding[3], w - padding[1] ]);
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var yScale = d3.scale.linear()
                    .range ( [ padding[0], h - padding[2] ]);
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var xAxis = d3.svg.axis()
                 .scale(xScale)
                 .orient("bottom")
                 .ticks(10)
                 .tickFormat(function(d)
                  { return d + " kg ";
              }) 
                 ;
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var yAxis = d3.svg.axis()
                 .scale(yScale)
                 .orient("left")
                 .ticks(7)
                 .tickFormat(function(d)
                  { return d + " t. ";
              }) 
                 ;
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var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
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      d3.csv("melaniejuliendata.csv", function(data) {
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        data.sort(function(a, b) {
        return d3.descending(+a.GHG2012, 
            +b.GHG2012);
        });
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        xScale.domain( [ 
            d3.min(data, function(d) {
        return +d.GHGin2012;
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         }),
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            d3.max(data, function(d) {
        return +d.GHGin2012;
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         }) 
            ]);
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        yScale.domain([ 
         d3.max(data, function(d) {
        return +d.totalGHG; 
        
         }),
        d3.min(data, function(d) {
        return +d.totalGHG; 
      })
        ]);
      
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     var circles = svg.selectAll("circle")
                    .data(data)
                    .enter()
                    .append("circle");
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               circles.attr("cx", -100)
                    .attr("cy", function(d, i) {
                        return yScale(d.totalGHG);
                    })
                    .attr("r", 0,1)
                    .attr("fill", "#D11919")
                    .append("title")
                    .text(function(d) {
                        return d.Country + "'s total GHG emissions in 2012 are " + d.totalGHG +" tonnes of CO2 equivalent, and emissions per capita are "+ d.GHGin2012 +" thousand kg";
                    });
              
              circles.transition()     
              .duration(2000)
               .attr("cx", function(d)  {
                return xScale(d.GHGin2012);
                  })
              .attr ("fill", "#006600")
              .attr ("r", 4);
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                svg.append("g")
                   .attr("class", "x axis")
                   .attr("transform", "translate(0," + (h - padding[2]) + ")")
                   .call(xAxis);
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                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 5) + ",0)")
                    .call(yAxis);
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​
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                    });
      
        </script>
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    </body>
</html>
    