D3 Examples

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
  margin: 15px;
  background-color: #F1F3F3    
}
.bar {
    fill: #6F257F;
}
.axis path,
.axis line {
  fill: none;
  stroke: #D4D8DA;
  stroke-width: 1px;
  shape-rendering: crispEdges;
}
.x path {
    display: none;
}
.toolTip {
    position: absolute;
  display: none;
  min-width: 80px;
  height: auto;
  background: none repeat scroll 0 0 #ffffff;
  border: 1px solid #6F257F;
  padding: 14px;
  text-align: center;
}
</style>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
    margin = {top: 20, right: 20, bottom: 30, left: 80},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom;
  
var tooltip = d3.select("body").append("div").attr("class", "toolTip");
  
var x = d3.scaleLinear().range([0, width]);
var y = d3.scaleBand().range([height, 0]);
​
var g = svg.append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
  
d3.csv("Patients.csv", function(error, data) {
    if (error) throw error;
  
    data = data.sort(function(a, b) { return a.sumtd - b.sumtd; }).filter(function(d) {return d.sumtd > 100000});
  
    x.domain([0, d3.max(data, function(d) { return d.sumtd; })]);
    y.domain(data.map(function(d) { return d.DRG; })).padding(0.1);
​
    g.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(d3.axisBottom(x).ticks(10).tickFormat(function (d) {
      if (d >=1000 && d<1000000) {
        d = d / 1000 + "K";
      }
      if (d >=1000000) {
        d = d / 1000000 + "M";
      }
      return d;
    }).tickSizeInner([-height]));
​
    g.selectAll(".bar")
        .data(data)
      .enter().append("rect")
        .attr("class", "bar")
        .attr("x", 0)
        .attr("height", y.bandwidth())
        .attr("y", function(d) { return y(d.DRG); })
        .attr("width", function(d) { return x(d.sumtd); })
        .on("mousemove", function(d){
            tooltip
              .style("left", d3.event.pageX - 50 + "px")
              .style("top", d3.event.pageY - 70 + "px")
              .style("display", "inline-block")
              .html((d.DRG) + "<br>" + (d.sumtd));
        })
            .on("mouseout", function(d){ tooltip.style("display", "none");});
  
  svg.append("text")
        .attr("id", "title")
        .attr("transform", "translate(320, 14)")
        .text("DRG Incident Count in the U.S. for 2011");
});
</script>
    