D3 Examples - MODULE4 Exercise: Adding Scales and Axes

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Water Consumption NY</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            rect:hover {
                fill: #000000;
                opacity: 0.5;
            }
            
            body {
                font-family: Helvetica, Arial, sans-serif;
                background-color: #6dcff6;
            }
            
            p {
                color: #3e3b3b;
                font-size: 11px;
                line-height: 0;
                margin: 15px 0 15px 10px;
            }
            
            
            h1 {
                color: #ffffff;
                font-family:tahoma;
                margin: -9px 0 0 10px;
                font-weight:100;
                font-size:200%;
                letter-spacing:3pt;
            }
            
            h3 {
                background-color: #ffffff; 
                color: #666666;
                font-family: tahoma;
                font-size: 14px;
                margin: 15px 0 5px 10px;
                font-weight:100;
                text-indent:10px;
                letter-spacing:3pt;
            }
            
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            em {
                fill: #000000;
                opacity: 0.7;
                font-style: italic;
            }
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            rect:hover {
                fill: #000000;
                opacity: 0.2;
            } 
        
            
            svg {
                background-color: #6dcff6;
            }
            
            .axis path,
            .axis line {
                fill: none;
                opacity: 0.1;
                stroke: #3e3b3b;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 7px;
                opacity: 0.6;
            }
            
            .y.axis path,
            .y.axis line {
                opacity: 0;
            }
            
        </style>
    </head>
    <body>
        
        
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        <h3>WATER CONSUMPTION</h3>
        <h1>IN NEW YORK CITY</h1>
        
                <p>A brief history of water consumption in the New York City Water Supply System (Based on New York City Census population).</p>
​
        <p><em>Millions of gallons per day. Source: <a href="https://catalog.data.gov/dataset/water-consumption-in-the-new-york-city-3d2f0">DATA.GOV</a>, 2015.</em></p>
        
        
        <script type="text/javascript">     
            
        
            var w = 650;
            var h = 350;
            var padding = [ 0, 20, 20, 35 ];  //Top, right, bottom, left
​
​
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            var widthScale = d3.scale.linear()
                                .range([ 0, w - padding[1] - padding[3] ]);
            
            var heightScale = d3.scale.ordinal()
                                .rangeRoundBands([ padding[0], h - padding[2] ], 0.1);
            
            
            var xAxis = d3.svg.axis()
                            .scale(widthScale)
                            .orient("bottom");
            
            var yAxis = d3.svg.axis()
                            .scale(heightScale)
                            .orient("left");
            
​
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
​
            
​
            
​
            d3.csv("WaterConsumptionInTheNewYorkCity.csv", function(data) {
​
                data.sort(function(a, b) {
                    return d3.descending(a.Year, b.Year);
​
                    //If your numeric values aren't sorting properly,
                    //try commenting out the line above, and instead using:
                    //
                    //return d3.descending(+a.lifeSatisfaction, +b.lifeSatisfaction);
                    //
                    //Data coming in from the CSV is saved as strings (text),
                    //so the + signs here force JavaScript to treat those
                    //strings instead as numeric values, thereby fixing the
                    //sort order (hopefully!).
                });
​
                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
                
                    widthScale.domain([ 0, d3.max(data, function(d) {
                    return +d.NYCConsumptionMilliongallonsperday;
                }) ]);
                
               heightScale.domain(data.map(function(d) { return d.Year; } ));
​
                rects.attr("x", padding[3])
                    .attr("y", function(d, i) {
                        return heightScale(d.Year);
                    })
                    .attr("width", function(d) {
                        return widthScale(d.NYCConsumptionMilliongallonsperday);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", "#3e3b3b")
                    .append("title")
                    .text(function(d) {
                        return d.NYCConsumptionMilliongallonsperday + " Millions of Gallons per Day in " + d.Year;
                    });
            
                svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
                    .call(xAxis);
                
                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 2) + ",0)")
                    .call(yAxis);
​
            });
​
    
​
        </script>
​
    </body>
</html>
    