D3 Examples - Knight Datavis Class Assignment 5 - data file has added column from wikipedia, 2 columns have been slightly transformed to be numbers

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>DataViz class Assignment 5</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            body {
                background-color: white;
                font-family: Helvetica, Arial, sans-serif;
            }
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            h1 {
                font-size: 24px;
                margin: 0;
            }
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            p {
                font-size: 14px;
                margin: 10px 0 0 0;
            }
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            svg {
                background-color: white;
            }
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            circle:hover {
                fill: orange;
            }
            
            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 11px;
            }
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        </style>
    </head>
    <body>
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        <h1>Module 5 Assignment</h1>
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        <p>Data used is 2015 Men's NCAA Basketball Championship Odds of Winning Source: <a href="https://github.com/fivethirtyeight/data/blob/master/march-madness-predictions/bracket-00.csv">@FiveThirtyEight</a>, 2015 and <a href="https://en.wikipedia.org/wiki/2015_NCAA_Men%27s_Division_I_Basketball_Tournament#Tournament_seeds">Wikipedia entry</a> for 2015 Men's Basketball Championship to get overall rankings (new column)</p>
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        <script type="text/javascript">     
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​
            var w = 700;
            var h = 600;
            var padding = [ 20, 10, 50, 50 ];  //Top, right, bottom, left
​
​
​
            var xScale = d3.scale.linear()
                                .range([ padding[3], w - padding[1] - padding[3] ]);
            
            var yScale = d3.scale.linear()
                                .range([ padding[0], h - padding[2] ]);
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​
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            var xAxis = d3.svg.axis()
                            .scale(xScale)
                            .orient("bottom")
                            .ticks(5)
                            .tickFormat(function(d) {
                                return d + "%";
                            });
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            var yAxis = d3.svg.axis()
                            .scale(yScale)
                            .orient("left")
                            .ticks(15);
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​
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            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
​
​
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            d3.csv("marchmadnesswinningodds.csv", function(data) {
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                xScale.domain([ 
                    d3.min(data, function(d) {
                        return +d.rd7_win_num;
                    }), 
                    d3.max(data, function(d) {
                        return +d.rd7_win_num;
                    })
                ]);
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                yScale.domain([
                    d3.min(data, function(d) {
                        return +d.overall_seed;
                    }),
                    d3.max(data, function(d) {
                        return +d.overall_seed;
                    })                  
                ]);
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                var circles = svg.selectAll("circle")
                                .data(data)
                                .enter()
                                .append("circle");
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                circles.attr("cx", function(d) {
                        return xScale(d.rd7_win_num);
                    })
                    .attr("cy", function(d) {
                        return yScale(d.overall_seed);
                    })
                    .attr("r", 4)
                    .attr("fill", "#007dc1")
                    .append("title")
                    .text(function(d) {
                        return d.team_name + "'s chance of winning is " + d.rd7_win_num + "%, and overall seed is " + d.overall_seed + ".";
                    });
​
                svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(0," + (h - padding[2] + 10) + ")")
                    .call(xAxis);
                
                // label for x axis
                svg.append("text")
                    .attr("transform", "translate(" + (w / 2) + " ," + (h - 5) + ")")
                    .style("text-anchor", "middle")
                    .text("Percent Chance of Winning");
​
​
                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 10) + ",0)")
                    .call(yAxis);
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                svg.append("text")
                    .attr("transform", "rotate(-90)")
                    .attr("y", 0 - padding[4])
                    .attr("x",0 - (h / 2))
                    .attr("dy", "1em")
                    .style("text-anchor", "middle")
                    .text("Overall Seed");
​
            });
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​
        </script>
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    </body>
</html>
    