D3 Examples - London: Average House Prices 1996-2014

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Line Chart</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.min.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>London: A 19 Year Average House Price Review</h1>
        <p> 1996-2014 </p>
        <p> Prices in UK Sterling </p>
        
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        <p> Source: <a href="https://data.london.gov.uk/dataset/average-house-prices-borough">London Data Store</a>, 2014</p>
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        <script type="text/javascript">     
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​
            var w = 700;
            var h = 600;
            var padding = [ 20, 10, 50, 100 ];  //Top, right, bottom, left
​
​
​
            //Set up date formatting and years
            var dateFormat = d3.time.format("%Y");
​
​
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            var xScale = d3.time.scale()
                                .range([ padding[3], w - padding[1] - padding[3] ]);
            
            var yScale = d3.scale.linear()
                                .range([ padding[0], h - padding[2] ]);
​
​
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            var xAxis = d3.svg.axis()
                            .scale(xScale)
                            .orient("bottom")
                            .ticks(15)
                            .tickFormat(function(d) {
                                return dateFormat(d);
                            });
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            var yAxis = d3.svg.axis()
                            .scale(yScale)
                            .orient("left");
​
​
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            var line = d3.svg.line()
                .x(function(d) {
                    return xScale(dateFormat.parse(d.year));
                })
                .y(function(d) {
                    return yScale(d.avprice);
                });
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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("london_prices.csv", function(data) {
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                xScale.domain([ 
                    d3.min(data, function(d) {
                        return dateFormat.parse(d.year);
                    }),
                    d3.max(data, function(d) {
                        return dateFormat.parse(d.year);
                    })
                ]);
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                yScale.domain([ 
                    d3.max(data, function(d) {
                        return +d.avprice ;
                    }),
                    0
                ]);
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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(dateFormat.parse(d.year));
                //  })
                //  .attr("cy", function(d) {
                //      return yScale(d.emissions);
                //  })
                //  .attr("r", 4)
                //  .attr("fill", "steelblue")
                //  .append("title")
                //  .text(function(d) {
                //      return d.year + " emissions: " + d.emissions + " kt";
                //  });
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                //Line
                //
                // Note data is wrapped in another array, so all its
                // values are bound to a single element (the line!)
                //
                svg.data([ data ])
                    .append("path")
                    .attr("class", "line usa")
                    .attr("d", line)
                    .attr("fill", "none")
                    .attr("stroke", "steelblue")
                    .attr("stroke-width", 2);
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                svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(0," + (h - padding[2] + 10) + ")")
                    .call(xAxis);
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                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 10) + ",0)")
                    .call(yAxis);
​
            });
​
​
        </script>
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    </body>
</html>
    