The Trees in Champaign by Diameter

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Trees in Champaign</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.min.js"></script>
		<style type="text/css">
			
			body {
				background-color:rgba(89,173,120,1.00);
			}

svg {
				background-color:rgba(185,228,246,1.00);
				margin:20px;
			}
			 rect { 
			 
				fill: #75523A;
			 }

</style>
	</head>
	<body>

var svg = d3.select("body")
						.append("svg")
						.attr("width", 1200)
						.attr("height", 1500);

d3.csv("Champaign-trees-diam-totals.csv", function(data) {

data.sort(function(a, b) {
					return d3.descending(+a.avgDiameter, +b.avgDiameter);

//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");

rects.attr("x", 0)
					.attr("y", function(d, i) {
						return i * 10;
					})
					.attr("width", function(d) {
						return Math.round((+d.avgDiameter) * 30);
					})
					.attr("height", 8)
					.append("title")
					.text(function(d) {
						return "Champaign's " + d.totalSpecimens + " " + d.commonName + " trees have an average diameter of " + Math.round((+d.avgDiameter)) + " feet.";
					});

});

</script>

</body>
</html>

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

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