widged/index.html

## index.html
<!-- Code from d3-graph-gallery.com -->
<!DOCTYPE html>
<meta charset="utf-8">

<!-- Load d3.js -->
<script src="https://d3js.org/d3.v4.js"></script>

<!-- Create a div where the graph will take place -->
<div id="my_dataviz"></div>


<script>

// set the dimensions and margins of the graph
var margin = {top: 10, right: 30, bottom: 30, left: 40},
    width = 460 - margin.left - margin.right,
    height = 400 - margin.top - margin.bottom;

// append the svg object to the body of the page
var svg = d3.select("#my_dataviz")
  .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 + ")");

let arrayOfNRand = (n, max) => { return Array(n).fill(0).map(d => Math.round(Math.random() * max)) }
const data = arrayOfNRand(1000, 20).map((s) => { return s === 0 ? 0 :
  (arrayOfNRand(s, 1).reduce((acc,d) => { return acc + d}, 0) / s);  }).filter(d => d !== 0)
// get the data

  // X axis: scale and draw:
  var x = d3.scaleLinear()
      .domain([0, 1])     // can use this instead of 1000 to have the max of data: d3.max(data, function(d) { return +d })
      .range([0, width]);
  svg.append("g")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x));

  // set the parameters for the histogram
  var histogram = d3.histogram()
      .value(function(d) { return d; })   // I need to give the vector of value
      .domain(x.domain())  // then the domain of the graphic
      .thresholds(x.ticks(8)); // then the numbers of bins

  // And apply this function to data to get the bins
  var bins = histogram(data);

  // Y axis: scale and draw:
  var y = d3.scaleLinear()
      .range([height, 0]);
      y.domain([0, d3.max(bins, function(d) { return d.length; })]);   // d3.hist has to be called before the Y axis obviously
  svg.append("g")
      .call(d3.axisLeft(y));

  // append the bar rectangles to the svg element
  svg.selectAll("rect")
      .data(bins)
      .enter()
      .append("rect")
        .attr("x", 1)
        .attr("transform", function(d) { return "translate(" + x(d.x0) + "," + y(d.length) + ")"; })
        .attr("width", function(d) { return x(d.x1) - x(d.x0) -1 ; })
        .attr("height", function(d) { return height - y(d.length); })
        .style("fill", "#69b3a2")

</script>
	<!-- Code from d3-graph-gallery.com -->
	<!DOCTYPE html>
	<meta charset="utf-8">

	<!-- Load d3.js -->
	<script src="https://d3js.org/d3.v4.js"></script>

	<!-- Create a div where the graph will take place -->
	<div id="my_dataviz"></div>


	<script>

	// set the dimensions and margins of the graph
	var margin = {top: 10, right: 30, bottom: 30, left: 40},
	width = 460 - margin.left - margin.right,
	height = 400 - margin.top - margin.bottom;

	// append the svg object to the body of the page
	var svg = d3.select("#my_dataviz")
	.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 + ")");

	let arrayOfNRand = (n, max) => { return Array(n).fill(0).map(d => Math.round(Math.random() * max)) }
	const data = arrayOfNRand(1000, 20).map((s) => { return s === 0 ? 0 :
	(arrayOfNRand(s, 1).reduce((acc,d) => { return acc + d}, 0) / s); }).filter(d => d !== 0)
	// get the data

	// X axis: scale and draw:
	var x = d3.scaleLinear()
	.domain([0, 1]) // can use this instead of 1000 to have the max of data: d3.max(data, function(d) { return +d })
	.range([0, width]);
	svg.append("g")
	.attr("transform", "translate(0," + height + ")")
	.call(d3.axisBottom(x));

	// set the parameters for the histogram
	var histogram = d3.histogram()
	.value(function(d) { return d; }) // I need to give the vector of value
	.domain(x.domain()) // then the domain of the graphic
	.thresholds(x.ticks(8)); // then the numbers of bins

	// And apply this function to data to get the bins
	var bins = histogram(data);

	// Y axis: scale and draw:
	var y = d3.scaleLinear()
	.range([height, 0]);
	y.domain([0, d3.max(bins, function(d) { return d.length; })]); // d3.hist has to be called before the Y axis obviously
	svg.append("g")
	.call(d3.axisLeft(y));

	// append the bar rectangles to the svg element
	svg.selectAll("rect")
	.data(bins)
	.enter()
	.append("rect")
	.attr("x", 1)
	.attr("transform", function(d) { return "translate(" + x(d.x0) + "," + y(d.length) + ")"; })
	.attr("width", function(d) { return x(d.x1) - x(d.x0) -1 ; })
	.attr("height", function(d) { return height - y(d.length); })
	.style("fill", "#69b3a2")

	</script>