Bar Chart - Tornadic Activity

A simple bar chart of tornadic activity in the state of Oklahoma since 1990. This is a simple bar chart showing the total number of tornadoes. I'll be fixing the text issues and creating a stacked bar version shortly. This is a D3 version of this chart published for Oklahoma Watch.

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.bar {
  fill: steelblue;
}

.bar text	{
	color: #000000;
}

.x.axis path {
  display: none;
}

div.tooltip {   
  position: absolute;           
  text-align: left;                 
  padding: 2px;           
  font: 12px sans-serif;        
  background: #EDEDED;   
  border: 0px;      
  border-radius: 8px;           
  pointer-events: none;         
}

</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>

var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;
    
var div = d3.select("body").append("div").attr("class", "tooltip").style("opacity", 0);

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);

var y = d3.scale.linear()
    .range([height, 0]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

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

var svg = d3.select("body").append("svg")
	.attr("class", "chart")
    .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("tornado90-13.csv", function(error, data) {

data.forEach(function(d) {
    d.total = +d.total
    d.year = +d.year;
  });

x.domain(data.map(function(d) { return d.year; }));
  y.domain([0, d3.max(data, function(d) { return d.total; })]);

svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xAxis);

svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Tornado count");

svg.selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.year); })
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.total); })
      .attr("height", function(d) { return height - y(d.total); })
      .on("mouseover", function (d) {
				div.transition()
				.duration(1000)
				.style("opacity", .9);
				div.html(
					"<table>"
					+"<tr><th>Year</th> <th>Total</th></tr>" 
					+ "<tr><td>" + d.year + ":</td><td>" + d.total + "</td></tr>"    
					+ "</table>")
				.style("left", (d3.event.pageX) + "px")
				.style("top", (d3.event.pageY-20) + "px")
			})
			.on("mouseout", function (d){
				div.transition()
				.duration(500)
				.style("opacity", 0);
			});
    
});

</script>

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

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