D3 Examples - Module 4 Exercise

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Loading CSV Data with D3</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;
            }
​
            h1 {
                font-size: 24px;
                margin: 0;
            }
​
            p {
                font-size: 14px;
                margin: 10px 0 0 0;
            }
            
            svg {
                background-color: burlywood;
                
            }
            
            rect:hover {
                fill: steelblue;
            }
            
            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
            }
            
            .y.axis path,
            .y.axis line {
                opacity: 0
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 11px;
                font-weight: bold;
            }
            
        </style>
    </head>
    <body>
        
        <h1>Happy Tree Usage</h1>
        <h2>How often did Bob Ross draw trees during each season</h2>
​
        <script type="text/javascript"> 
            
            var h = 600;
            var w = 500;
            var padding = [20,10,20,80]; //Top, Right, Bottom, Left
​
            var svg = d3.select("body")
                    .append("svg")
                    .attr("width", w)
                    .attr("height", h);
            
            var widthScale = d3.scale.linear()
                                .range([0, w-padding[1] - padding[3] ]);
            
            var heightScale = d3.scale.ordinal()
                                .rangeRoundBands([ padding[0], h-padding[2] ], 0.3);
            
            var xAxis = d3.svg.axis()
                            .scale(widthScale)
                            .orient("bottom");
            
            var yAxis = d3.svg.axis()
                            .scale(heightScale)
                            .orient("left");
            
​
            //Load in contents of CSV file
            d3.csv("bob_ross_aggregate_data_by_season.csv", function(data) {
                
            data.sort(function(a,b) {
                    return d3.descending(+a.trees, +b.trees);
            });
                
            widthScale.domain([0, d3.max(data, function(d) {
                return +d.trees;
            })])
            
//            heightScale.domain(d3.range(data.length));
                
            heightScale.domain(data.map(function(d) { return "Season " + d.seaon_num; } ));
​
            var rects = svg.selectAll("rect")
                    .data(data)
                    .enter()
                    .append("rect");
​
            rects.attr("x", padding[3])
                .attr("y", function(d,i) {
                    return heightScale("Season " + d.seaon_num);
                })
                .attr("width", function(d) {
                    return widthScale(d.trees);
                })
                .attr("height", heightScale.rangeBand())
                .attr("fill", "green")
                .append("title")
                    .text(function(d) {
                        return d.trees;
                });
            
            svg.append("g")
                .attr("class", "y axis")
                .attr("transform", "translate(" + (padding[3] - 5) + ",0)")
                .call(yAxis);
                
            svg.append("g")
                .attr("class", "x axis")
                .attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
                .call(xAxis);
​
            });
​
        </script>
​
    </body>
</html>
    