Week 4: Homelessness by State

<!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: white;
            }

rect:hover {
                fill: orange;
            }
            
            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
            }
            
            .axis text {
                font-family: sans-serif;
                font-size: 11px;
            }

.y.axis path,
            .y.axis line {
                opacity: 0;
            }

</style>
</head>
<body>

<h1>Homeless population in the USA, 2014</h1>

var index = 0;
    var w = 600, h = 600;
    var padding = [ 40, 10, 10, 30 ];  //Top, right, bottom, left

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("top");

var yAxis = d3.svg.axis()
                            .scale(heightScale)
                            .orient("left");

var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);

//Load in contents of CSV file
    d3.csv("homeless_by_state_2014.csv", function(data) {
                console.log(data.total2014);
                data.sort(function(a, b) {
                    return d3.descending(+a.total2014, +b.total2014);
                });

widthScale.domain([ 0, d3.max(data, function(d) {
                    return +d.total2014;
                }) ]);

heightScale.domain(data.map(function(d) { return d.state; } ));

var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");

rects.attr("x", padding[3])
                    .attr("y", function(d) {
                        return heightScale(d.state);
                    })
                    .attr("width", function(d) {
                        return widthScale(d.total2014);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", "steelblue")
                    .append("title")
                    .text(function(d) {
                        return d.state + "'s homeless population is " + d.total2014;
                    });

svg.append("g")
                    .attr("class", "x axis")
                    .attr("transform", "translate(" + padding[3] + "," + (padding[1]+20) + ")")
                    .call(xAxis);

svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + padding[3] + ",0)")
                    .call(yAxis);

});

</script>

</body>
</html>

Modified http://d3js.org/d3.v3.js to a secure url

https://d3js.org/d3.v3.js