D3 Examples - Exercise for Module 4

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Scales and Stuff</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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            rect:hover {
                fill: orange;
            }
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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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            .y.axis path,
            .y.axis line {
                opacity: 0;
            }
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        </style>
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    </head>
    <body>
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        <p>Exercise for Module 4: Scales and Stuff</p>
        <h2>Ranking: Brazilian Soccer League, Top20 Performances</h2>
        <p><em>From 2003 to 2014, Divisions <span style="background-color:lightgreen">A</span> and <span style="background-color:salmon">B</span> | Percentage of points won</em></p>
    
        <script type="text/javascript">
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            var w = 600;
            var h = 500;
            var padding = [ 40, 40, 40, 150 ];
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            var widthScale = d3.scale.linear()
                    .range([ 0, w - padding[1] - padding[3] ]);
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            var heightScale = d3.scale.ordinal()
                    .rangeRoundBands([ padding[0], h - padding[2] ], 0.3);
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            var xAxis = d3.svg.axis()
                .scale(widthScale)
                .tickFormat(function(d) { return d * 100 + "%"; })
                .orient("bottom");
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            var yAxis = d3.svg.axis()
                .scale(heightScale)
                .orient("left");
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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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//          widthScale.domain([0, d3.max(top20, function(d) {
//              return +d.PctPts;
//          })]);
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            widthScale.domain([0, 1]);
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            heightScale.domain(top20.map(function(d) {
            return d.Team + " " + d.Year;
        }));
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            var rects = canvas.selectAll("rect")
                    .data(top20)
                    .enter()
                    .append("rect");
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            rects.attr("x", padding[3])
                .attr("y", function(d) {
                    return heightScale(d.Team + " " + d.Year);
                })
                .attr("width", function(d) {
                    return widthScale(d.PctPts);
                })
                .attr("height", heightScale.rangeBand())
                .style("fill", function(d) {
                    if (d.Division == "A") {
                        return "lightgreen";
                    } else {
                        return "salmon";
                    }
                    
                })
                .attr("onmouseover", "evt.target.setAttribute('opacity', '0.5');")
                .attr("onmouseout", "evt.target.setAttribute('opacity','1)');")
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                .append("title")
                .text(function(d) {
                    return d.PctPts * 100 + "%";
                });
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            canvas.append("g")
                .attr("class", "axis")
                .attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
                .call(xAxis);
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            canvas.append("g")
                .attr("class", "y axis")
                .attr("transform", "translate(" + (padding[3] - 5) + ",0)")
                .call(yAxis);
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            });
        </script>
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    </body>
</html>
    