d3-node/examples/histogram.js at master · bpom/d3-node · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
const D3Node = require('./../index');
const d3 = require('d3')

const styles = `
.bar rect {
  fill: steelblue;
}

.bar text {
  fill: #fff;
  font: 10px sans-serif;
}`;

var options = {
  svgStyles: styles,
  d3Module: d3
};

var d3n = new D3Node(options);

// from https://bl.ocks.org/mbostock/3048450
var data = d3.range(1000).map(d3.randomBates(10));

var formatCount = d3.format(",.0f");

var margin = {top: 10, right: 30, bottom: 30, left: 30},
  width = 960 - margin.left - margin.right,
  height = 500 - margin.top - margin.bottom;

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

var bins = d3.histogram()
  .domain(x.domain())
  .thresholds(x.ticks(20))
(data);

var y = d3.scaleLinear()
  .domain([0, d3.max(bins, function(d) { return d.length; })])
  .range([height, 0]);

const svgWidth = width + margin.left + margin.right
const svgHeight = height + margin.top + margin.bottom

var svg = d3n.createSVG(svgWidth, svgHeight)
  .append("g")
  .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var bar = svg.selectAll(".bar")
  .data(bins)
  .enter().append("g")
  .attr("class", "bar")
  .attr("transform", function(d) { return "translate(" + x(d.x0) + "," + y(d.length) + ")"; });

bar.append("rect")
  .attr("x", 1)
  .attr("width", x(bins[0].x1) - x(bins[0].x0) - 1)
  .attr("height", function(d) { return height - y(d.length); });

bar.append("text")
  .attr("dy", ".75em")
  .attr("y", 6)
  .attr("x", (x(bins[0].x1) - x(bins[0].x0)) / 2)
  .attr("text-anchor", "middle")
  .text(function(d) { return formatCount(d.length); });

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

// create output files
require('./lib/output')('histogram', d3n);