Normal Distributions

Compering 2 normal distributions.

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

body {
          font: 10px sans-serif;
        }

.line {
          stroke: #000;
          stroke-width: 1.5px;
        }

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

</style>
<body>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script src="https://cdn.jsdelivr.net/jstat/latest/jstat.min.js"></script>
<script>

var margin = {top: 20, right: 30, bottom: 30, left: 40},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var array1 = Random_normal_Dist(30, 15);
var array2 = Random_normal_Dist(30, 10);

var x = d3.scaleLinear()
            .rangeRound([0, width]);

//Min q
    var d1 = d3.min(array1, function (d) { return d.q; });
    var d2 = d3.min(array2, function (d) { return d.q; });
    var min_d = d3.min([d1, d2]);

//Max q
    d1 = d3.max(array1, function (d) { return d.q; });
    d2 = d3.max(array2, function (d) { return d.q; });
    var max_d = d3.max([d1, d2]);

//Max p
    d1 = d3.max(array1, function (d) { return d.p; });
    d2 = d3.max(array2, function (d) { return d.p; });
    var max_p = d3.max([d1, d2]);

x.domain([min_d, max_d]).nice;

var y = d3.scaleLinear()
      .domain([0, max_p])
      .range([height, 0]);

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 + ")");

var gX = svg.append("g")
              .attr("class", "x axis")
              .attr("transform", "translate(0," + height + ")")
              .call(d3.axisBottom(x));

//var gY = svg.append("g")
  //            .attr("class", "y axis")
  //            .call(d3.axisLeft(y));

var line = d3.line()
      .x(function (d) { return x(d.q); })
      .y(function (d) { return y(d.p); });

svg.append("path")
      .datum(array1)
      .attr("class", "line")
      .attr("d", line)
      .style("fill", "#fdae61")
      .style("opacity", "0.5");

svg.append("path")
      .datum(array2)
      .attr("class", "line")
      .attr("d", line)
      .style("fill", "#4393c3")
      .style("opacity", "0.5");

</script>

https://d3js.org/d3.v4.min.js

https://cdn.jsdelivr.net/jstat/latest/jstat.min.js