D3 Examples - Exercise for Module 5

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Scatterplot</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
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        <style type="text/css">
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            body {
                background-color: lightgrey;
            }
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            svg {
                background-color: white;
            }
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            circle:hover {
                stroke-width: 1px;
                r: 6;
            }
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            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
            }
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            .axis text {
                font-family: sans-serif;
                font-size: 11px;
            }
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​
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        </style>
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    </head>
    <body>
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        <p>Exercise for Module 5: Scatterplot</p>
        <h2>Brazilian Soccer League (Goals For vs. Performance)</h2>
        <p><em>From 2003 to 2014, Divisions <span style="background-color:lightgreen">A</span> and <span style="background-color:salmon">B</span></em></p>
    
        <script type="text/javascript">
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            var w = 600;
            var h = 500;
            var padding = [ 80, 40, 80, 80 ]; // T R B L
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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)
                .tickFormat(function(d) { return d * 100 + "%"; })
                .orient("bottom");
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            var yAxis = d3.svg.axis()
                .scale(yScale)
                .orient("left")
                .ticks(4);
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            var canvas = d3.select("body")
            .append("svg")
            .attr("width", w)
            .attr("height", h);
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            d3.csv("BrazilianLeague_A_B_2003_2014.csv", function(data) {
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                data.sort(function(a, b) {
                    return d3.descending(a.PctPts, b.PctPts);
                });
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//          var top20 = data.slice(0,20);
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//          xScale.domain([0, d3.max(top20, function(d) {
//              return +d.PctPts;
//          })]);
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            xScale.domain([0.1, 0.8]);
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            yScale.domain([2.5, 0.5]);
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            var circle = canvas.selectAll("circle")
                    .data(data)
                    .enter()
                    .append("circle");
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            circle.attr("cx", padding[0])
                .attr("cy", h - padding[0])
                .attr("r", .1)
                .style("fill", function(d) {
                    if (d.Division == "A") {
                        return "lightgreen";
                    } else {
                        return "salmon";
                    }
                })
                .attr("stroke", "black")
                .attr("stroke-width", "0px")
                .attr("onmouseover", "evt.target.setAttribute('r', '4');")
                .attr("onmouseout", "evt.target.setAttribute('r', '3');")
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                .append("title")
                .text(function(d) {
                    return d.Team + " " + d.Year + " (" + d.PctPts * 100 + "% | " + d.aGF + ")";
                });
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                circle.sort(function(a, b) {
                    return d3.ascending(+a.Position, +b.Position);
                })
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                circle.transition()
                    .delay(function(d, i) {
                        return i * 5;
                    })
                    .duration(1000)
                    .attr("cx", function(d) {
                    return xScale(d.PctPts);
                })
                    .attr("cy", function(d) {
                    return yScale(d.aGF);
                })
                    .attr("r", 3);
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            canvas.append("g")
                .attr("class", "x axis")
                .attr("transform", "translate(0," + (h - padding[2]) + ")")
                .call(xAxis);
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            canvas.append("g")
                .attr("class", "y axis")
                .attr("transform", "translate(" + (padding[3] ) + ",0)")
                .call(yAxis);
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            canvas.append("text")
                .attr("x", (w - padding[3]) * 0.5 + padding[3])
                .attr("y", h - (padding[0] * 0.5))
                .attr("text-anchor", "middle")
                .text("Percentage of points won");
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            canvas.append("text")
                .attr("x", (padding[3] * 0.5))
                .attr("y", h * 0.5 )
                .attr("text-anchor", "middle")
                .text("Goals For Average")
                .attr("transform", "rotate(-90, 40, 250)");
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            });
        </script>
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    </body>
</html>
    