d3: Education and Poverty Scatterplot/ with mouseover data

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Scatterplot</title>
		<script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
		<style type="text/css">
			
			body {
    			font-family:  "Palatino Linotype", "Book Antiqua", Palatino, serif;
    			background-color: white;
    			padding: 50px;
    		}

h1 {
				font-size: 24px;
				margin: 0;
			}

p {
				font-size: 14px;
				margin: 10px 0 0 0;
			}

svg {
				background-color: white;
			}
			
			
			.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			.axis text {
				font-family: sans-serif;
				font-size: 11px;
			}
			.tooltip {
				/*font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;*/
				font-size: 14px;
				background-color: white;
				opacity: 0.9;

}

</style>
	</head>
	<body>

<h1>Poor Educational Outcomes and Links to Poverty</h1>

<p>From the 2014 Annie E. Casey Foundation, KIDS COUNT Data Book. Percentage of childhood poverty vs. percentage of 8th graders listed as non-proficient in mathematics (higher percentage is worse), by US state. Source: <a href=https://www.aecf.org/resources/the-2014-kids-count-data-book/auxiliary-materials/>aecf.org</a>, 2014. Mouse over points to see data for each state in 2005 (green points) and 2013 (blue points). </p>

<p>While the overall correlation is for poorer performance with greater poverty there also appears to be a general trend for greater mathematical performance between 2005 to 2013...however, looking state by state this often seems to occur with a corresponding increase in poverty <em>(many, but not all states move down (better math performance) and to the right (increase poverty) from 2005 to 2013).</em> <br><br>What does this say about the actual relationship between poverty and performance <em>(at least using this metric)?</em></p>

var margin = {top: 20, right: 0, bottom: 60, left: 130},
    			width = 900 - margin.left - margin.right,
    			height = 600 - margin.top - margin.bottom;

var color = d3.scale.ordinal()
          			.range(["#1f77b4", "#98df8a"])
          			.domain(d3.range(0,1));

var xScale = d3.scale.linear()
								.range([ margin.bottom, width - margin.top - margin.bottom ]);
			
			var yScale = d3.scale.linear()
								.range([ margin.top, height - margin.right ]);

var xAxis = d3.svg.axis()
							.scale(xScale)
							.orient("bottom")
							.ticks(9)
							.tickFormat(function(d) {
								return d + "%";
							});

var yAxis = d3.svg.axis()
							.scale(yScale)
							.orient("left")
							.tickFormat(function(d) {
								return d + "%";
							});

var svg = d3.select("body")
						.append("svg")
						.attr("width", width + margin.left + margin.right)
						.attr("height", height + margin.top + margin.bottom)
						.append("g")
    					.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

d3.csv("Education_Poverty.csv", function(data) {

xScale.domain([ 
					d3.min(data, function(d) {
						return +d.child_pov;
					}), 
					d3.max(data, function(d) {
						return +d.child_pov;
					})
				]);

yScale.domain([
					d3.max(data, function(d) {
						return +d.non_math_prof;
					}),
					d3.min(data, function(d) {
						return +d.non_math_prof;
					})
				]);

var circles = svg.selectAll("circle")
			      	.data(data)
			    	.enter()
			    	.append("circle")
			    	.attr("class", function(d) {return d.state});

circles.attr("cx", function(d){
			      	return xScale(d.child_pov);
					})
					.attr("cy", function(d) {
						return yScale(d.non_math_prof);
					})
					.attr("r", 6)
					.attr("stroke", "grey")
					.attr("fill", function (d) {
						if(d.state == "United_States") {
							return "#e377c2";
						} else {
						return color(d.year);
					} });

circles.on("mouseover", function(d){
			        	var states = d3.selectAll('circle.' +d.state)
			          		.attr("r", 8)
			          		.attr("fill","orange")

var tooltips = d3.select('svg').append('g');

var textSize = text.node().getBBox();

rect.attr("height",  textSize.height + 2)
  							.attr("width",  textSize.width + 10);

});

circles.on("mouseout", function(d) {
			          d3.select('svg').selectAll('text.tooltip').remove();
			          d3.select('svg').selectAll('rect').remove();
			          d3.selectAll('circle.' +d.state)
			          		.attr("r", 6)
			          		.attr("fill", function(d) {
						if(d.state == "United_States") {
							return "#e377c2";
						} else {
						return color(d.year);
					} });
			      });

svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(0," + (height + 10) + ")")
					.call(xAxis)
					.append("text")
      					.attr("y", margin.bottom/1.4) //smaller divider moves down
      					.attr("x",width/2.8)
      					.text("Percentage of Children Living in Poverty")
      					.attr("font-family","serif")
      					.attr("font-size","16px");

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + (margin.bottom - 10) + ",0)")
					.call(yAxis)
					.append("text")
				      .attr("transform", "rotate(-90)")
				      .attr("y",-margin.top*3.3) //bigger mulitplier moves to the left
				      .attr("x",-height/2)  //smaller divider moves up
				      .attr("dy", ".71em")
				      .style("text-anchor", "middle")
				      .text("Percentage of 8th Graders Not Proficient in Math")
				      .attr("font-family","serif")
				      .attr("font-size","16px");

});

</script>

</body>
</html>

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

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