bar graph

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

.bar {
  fill: steelblue;
}

.bar:hover {
  fill: brown;
}

.axis {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
  
  .div_style1 {
      border: 2px solid grey;
      width: 1050px;
      height: 600px;
}

.x.axis path {
  display: none;
}

</style>
<body>
  <div id="div1" class="div_style1"></div>
<script src="//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;
  d3.select(self.frameElement).style("height", "800px");

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 color = d3.scale.category10();

var svg = d3.select("#div1").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.tsv("https://gist.githubusercontent.com/sjhavanur/d335d1ea06102c47d653/raw/f3806d672c8112225a06c6b7b5f5fafbbd67547c/medicareavg.tsv", function(error, data) {
  if (error) throw error;

x.domain(data.map(function(d) { return d.nppes_provider_state; }));
  y.domain([0, d3.max(data, function(d) { return d.average_submitted_chrg_amt; })]);
  
  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("Frequency");

svg.selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(d.nppes_provider_state); })
      .attr("width", x.rangeBand())
      .attr("y", function(d) { return y(d.average_submitted_chrg_amt); })
      .attr("height", function(d) { return height - y(d.average_submitted_chrg_amt); })
  .style("fill", function(d) { return color(d.nppes_provider_state); });
  
   var legend = svg.selectAll(".legend")
      .data(color.domain())
    .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(60," + i * 20 + ")"; });

legend.append("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);

legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".25em")
      .style("text-anchor", "end")
      .text(function(d) { return d; });
});

</script>

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