Exercise 4: Temp difference from long-term average

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Temperature Anomalies</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: gray;
			}
			
			.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>Temperature ups and downs</h1>

<p>The difference in each year's average temperature from the long-term average (1880 to 2014), in degrees Celsius.</p>
		<p>Source: <a href="https://www.ncdc.noaa.gov/monitoring-references/faq/anomalies.php">NOAA National Climatic Data Center.</a></p>

var w = 700;
			var h = 1800;
			var padding = [ 20, 10, 30, 120 ];  //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("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("TempAnomolies.csv", function(data) 
				{

data.sort(function(a, b) {
					return d3.ascending(a.Year, b.Year);
				});

widthScale.domain([ -0.4, d3.max(data, function(d) {
					return +d.ValueLandOcean;
				}) ]);
console.log("domain:", widthScale.domain())

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

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

rects.attr("x", function(d) { 
                  var x = padding[3];
                  var value = +d.ValueLandOcean
                  if(d.ValueLandOcean > 0) {
                    x += widthScale(0)
                  }else {
                  x += widthScale(value)
                  }
                  return x;
                })
					.attr("y", function(d) {
						return heightScale(d.Year);
					})
					.attr("width", function(d) {
              if(d.ValueLandOcean >= 0) {
                return widthScale(d.ValueLandOcean) - widthScale(0)
              }else {
                return widthScale(0) - widthScale(d.ValueLandOcean);
              }
					})
					.attr("height", heightScale.rangeBand())
					.attr("fill", "darkkhaki")
					.append("title")
					.text(function(d) {
						return d.Year + "'s temperature difference from long-term average is " + d.ValueLandOcean;
					});

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] + ",0)")
					.call(yAxis);

svg.append("line")
.attr({
x1: padding[3] + widthScale(0),
x2: padding[3] + widthScale(0),
y1: 0,
y2: h,
stroke: "#000"
})

});

</script>

</body>
</html>

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

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