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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>reveal.js – The HTML Presentation Framework</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/white.css" id="theme">
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<section>
<h1>图表分享</h1>
<h3>混合散点直方图</h3>
<p>
<small>Shared by CK</small>
</p>
</section>
<section>
<iframe width="1100px" height="900px" align="middle" data-src="./chart/1.html"></iframe>
</section>
<section>
<iframe width="1100px" height="900px" align="middle" data-src="./chart/3.html"></iframe>
</section>
</section>
<section>
<h2>讲解步骤</h2>
<ol>
<li>数据结构</li>
<li>图表结构</li>
<li>绘制前的准备: 配置, 数据预处理, 比例尺等</li>
<li>绘制直方图</li>
<li>绘制散点图</li>
<li>绘制滑动条</li>
</ol>
</section>
<section>
<h2>数据结构</h2>
<pre><code class="hljs" data-trim contenteditable>
const data = [
{id: 1, date: '2017-12-18-09},
{id: 2, date: '2017-12-18-11},
{id: 3, date: '2017-12-18-15},
{id: 4, date: '2017-12-19-22},
{id: 5, date: '2017-12-20-12},
{id: 6, date: '2017-12-21-13},
{id: 7, date: '2017-12-22-14},
{id: 8, date: '2017-12-23-15},
{id: 9, date: '2017-12-24-16},
]
</code></pre>
</section>
<section>
<section>
<h2>图表结构</h2>
<iframe width="1100px" height="900px" align="middle" data-src="./chart/3.html"></iframe>
</section>
<section>
<h3>总体结构</h3>
<pre><code class="hljs" data-trim contenteditable>
<svg width="960" height="500">
<g class="histogram"></g> <!-- 直方图部分-->
<g class="slider"></g> <!-- 滑动条部分-->
<g class="plot"></g> <!--散点图部分-->
</svg>
</code></pre>
</section>
<section>
<h3>直方图部分</h3>
<pre><code class="hljs" data-trim contenteditable>
<g class="histogram">
<g>
<rect width="70" height="30" fill="#85d1ea"></rect>
<text>66</text>
</g>
<!-- repeat g-->
</g>
</code></pre>
</section>
<section>
<h3>滑动条部分</h3>
<pre class="small"><code class="hljs" data-trim contenteditable>
<g class="slider">
<!-- 背景条-->
<rect class="drag-bar"></rect>
<!-- 时间刻度-->
<g class="ticks">
<text x="71" y="10" text-anchor="middle">2月18</text>
<!-- repeat text-->
</g>
<!-- 拖动圆点-->
<circle class="handle"></circle>
<!-- 事件绑定层-->
<rect class="drag-layer"></rect>
</g>
</code></pre>
</section>
<section>
<h3>散点图部分</h3>
<pre><code class="hljs" data-trim contenteditable>
<g class="plot">
<circle cx="138" cy="233" r="5"></circle>
<!-- repeat circle -->
</g>
</code></pre>
</section>
</section>
<!-- Example of nested vertical slides -->
<section>
<section>
<h2>绘制前的准备: </h2>
<p>配置, 数据预处理, 比例尺等</p>
</section>
<section>
<h4>1. 基础配置</h4>
<pre><code class="hljs" data-trim contenteditable>
const margin = {top:50, right:50, bottom:50, left:50},
width = 900 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom
const histHeight = 100
</code></pre>
</section>
<section>
<h4>2.1 数据预处理</h4>
<pre><code class="hljs" data-trim contenteditable>
const parseDate = d3.timeParse('%Y-%m-%d-%H')
data.forEach(d => {
d.date = parseDate(d.date)
})
// d3.timeParse 时间解析
//
// parseDate('2017-12-18-09')
// =>
// Mon Dec 18 2017 09:00:00 GMT+0800 (CST)
</code></pre>
</section>
<section>
<h4>2.2 数据预处理</h4>
<pre><code class="hljs" data-trim contenteditable>
const startDate = new Date('2017-12-18 00:00:00')
const endDate = new Date('2017-12-25 00:000:00')
const dateArray = d3.timeDays(startDate, endDate)
// d3.range(1, 5) => [1,2,3,4]
// d3.timeDays是d3.timeDay.range的别名
// 类似的还有 d3.timeYears, d3.timeMonths, d3.timeSaturdays等
</code></pre>
<img data-src="./4.png" alt="Down arrow">
</section>
<section>
<h4>3.1 颜色比例尺</h4>
<pre><code class="hljs" data-trim contenteditable>
const colours = d3.scaleOrdinal()
.domain(dateArray)
.range([
'#409ffb', '#85d1ea', '#65cccb',
'#77debd', '#6ccb74', '#abdf81', '#fbd340'
]);
// d3.scaleOrdinal - 创建一个序数比例尺
</code></pre>
</section>
<section>
<h4>3.2 x轴时间比例尺</h4>
<pre><code class="hljs" data-trim contenteditable>
const x = d3.scaleTime()
.domain([startDate, endDate])
.range([0, width])
.clamp(true)
// 1. d3.scaleTime —— 创建时间线性比例尺
// 2. time.clamp —— 启用闭合
</code></pre>
</section>
<section>
<h4>3.3 直方图生成器</h4>
<pre><code class="hljs" data-trim contenteditable>
const histogram = d3.histogram()
.value(d => d.date)
.domain(x.domain())
.thresholds(dateArray)
const bins = histogram(data)
// d3.histogram 创建一个新的直方图生成器 (本质是一个数据切分器)
// histogram.value 为每个样本指定一个值访问器 (指定你要切分的数据字段)
// histogram.domain 指定可观测值的间隔 (指定数据范围)
// histogram.thresholds 指定值划分成不同箱的方法 (指定切分的方法或者数组)
</code></pre>
</section>
<section>
<pre><code class="hljs" data-trim contenteditable>
const bins = histogram(data)
</code></pre>
<img data-src="./1.png" alt="Down arrow">
</section>
<section>
<h4>3.4 Y轴线性比例尺</h4>
<pre><code class="hljs" data-trim contenteditable>
const y = d3.scaleLinear()
.domain([0, d3.max(bins, d => d.length)])
.range([0, histHeight])
// d3.scaleLinear - 创建定量线性比例尺
// d3.max d3.max - 计算数组中的最大值
</code></pre>
<img data-src="./5.png" alt="Down arrow">
</section>
<section>
<h4>3.5 绘制容器g</h4>
<pre class="small"><code class="hljs" data-trim contenteditable>
// 直方图容器g
const hist = svg.append('g')
.attr('class', 'histogram')
.attr('transform', `translate(${margin.left}, ${margin.top})`)
// 滑动条容器g
const slider = svg.append('g')
.attr('class', 'slider')
.attr('transform', `translate(${margin.left}, ${margin.top + histHeight})`)
// 散点图容器g
const plot = svg.append('g')
.attr('class', 'plot')
.attr('transform', `translate(${margin.left}, ${margin.top + histHeight + 50})`)
</code></pre>
</section>
</section>
<section>
<section>
<h2>绘制直方图</h2>
<pre class="small"><code class="hljs" data-trim contenteditable>
// y轴比例尺
const y = d3.scaleLinear()
.domain([0, d3.max(bins, d => d.length)])
.range([0, histHeight])
const bar = hist.selectAll('.bar')
.data(bins).enter()
.append('g')
.attr('class', 'bar')
.attr('transform', d => `translate(${x(d.x0)}, ${histHeight - y(d.length)})`)
bar.append('rect')
.attr('class', 'bar')
.attr('width', d => x(d.x1) - x(d.x0) - 1) // 1是柱子间的间隔
.attr('height', d => y(d.length))
.attr('fill', d => colours(d.x0))
bar.append('text')
.attr('y', '6')
.attr('x', d => (x(d.x1) - x(d.x0))/2)
.attr('text-anchor', 'middle')
.text(d => d.length)
</code></pre>
</section>
<section>
<img data-src="./3.png" alt="Down arrow">
</section>
</section>
<section>
<section>
<h2>绘制散点图</h2>
<pre class="small"><code class="hljs" data-trim contenteditable>
function drawPlot(data) {
const locations = plot.selectAll('.location')
.data(data, d => d.id)
locations.enter()
.append('circle')
.attr('class', 'location')
.attr('cx', d => x(d.date))
.attr('cy', d => Math.random() * 100)
.attr('fill', d => colors(d3.timeDay(d.date)))
.attr('stroke', d => colors(d3.timeDay(d.date)))
.attr('opacity', 0.7)
.attr('r', 5)
.transition()
.duration(400)
.attr('r', 15)
.transition()
.attr('r', 5)
locations.exit().remove()
}
</code></pre>
</section>
<section>
<h2>关于Update、Enter、Exit</h2>
<ul>
<li> 有数据，而没有足够图形元素的时候，使用enter方法可以添加足够的元素</li>
<li> 有元素与数据对应的部分称为 Update </li>
<li> 元素存在但是没有数据绑定的部分被称为 Exit </li>
<li> exit 部分的处理办法一般是：删除元素</li>
</ul>
</section>
<section>
<iframe width="1100px" height="900px" align="middle" data-src="./chart/4.html"></iframe>
</section>
</section>
<section>
<section>
<h2>绘制滚动条部分</h2>
<pre class="small"><code class="hljs" data-trim contenteditable>
function drawSlider() {
// 轨迹背景条
slider.append('rect')
.attr('class', 'drag-bar')
.attr('x', 0)
.attr('y', 0)
.attr('width', width)
.attr('height', 10)
.attr('fill', '#dcdcdc')
.attr('rx', 4)
.attr('ry', 4)
// 绘制日期刻度
slider.append('g', '.track-overlay')
.attr('class', 'ticks')
.attr('transform', 'translate(0, 18)')
.selectAll('text')
.data(x.ticks(7))
.enter()
.append('text')
.attr('x', x)
.attr('y', 10)
.attr('text-anchor', 'middle')
.text(d => formatDateIntoDay(d))
// 绘制拖动点
handle = slider.append('circle', '.track-overlay')
.attr('class', 'handle')
.attr('r', 9)
.attr('cy', 5)
// 可拖拽区域(时间绑定区域)
slider.append('rect')
.attr('class', 'drag-layer')
.attr('x', 0)
.attr('y', -35)
.attr('width', width)
.attr('height', 70)
.attr('fill', 'transparent')
.call(
d3.drag().on('start drag', update)
)
}
</code></pre>
</section>
<section>
<h2>绑定拖拽事件</h2>
<pre><code class="hljs" data-trim contenteditable>
slider.append('rect')
.attr('class', 'drag-layer')
.attr('x', 0)
.attr('y', -35) // 起始位置是0轴的位置
.attr('width', width)
.attr('height', 70)
.attr('fill', 'transparent')
.call(
d3.drag().on('start drag', update)
)
</code></pre>
<ul>
<li> d3.drag - 创建一个拖曳行为</li>
<li> drag.on - 监听拖曳事件 </li>
<li> start - on mousedown or touchstart</li>
<li> drag - on mousemove or touchmove</li>
<li> end - on mouseup, touchend or touchcancel</li>
</ul>
</section>
<section>
<h2>更新数据</h2>
<pre class="small"><code class="hljs" data-trim contenteditable>
function update() {
// 获取位置转换的日期时间信息
const h = x.invert(d3.event.x)
// 改变拖动条的位置
handle.attr('cx', x(h))
// 刷选出当前位置所表示时间之前的数据
const newData = data.filter(d => d.date < h)
// 重汇散点图
drawPlot(newData)
// 重新设置颜色, 小于h的还是原来的颜色，大于h的则置灰
d3.selectAll('.bar')
.attr('fill', d => d.x0 < h ? colors(d.x0) : '#eaeaea')
}
</code></pre>
</section>
<section>
<iframe width="1100px" height="300px" align="middle" data-src="./chart/3.html"></iframe>
</section>
</section>
<section>
<section>
<h1>What's more </h1>
</section>
<section>
<iframe width="1100px" height="500px" align="middle" data-src="./chart/5.html"></iframe>
</section>
<section>
<iframe width="1100px" height="500px" align="middle" data-src="./chart/6.html"></iframe>
</section>
<section>
<iframe width="1100px" height="500px" align="middle" data-src="./chart/7.html"></iframe>
</section>
</section>
<section>
<h1>谢谢观看</h1>
</section>
</div>
</div>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
// More info https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
transition: 'slide', // none/fade/slide/convex/concave/zoom
// More info https://github.com/hakimel/reveal.js#dependencies
dependencies: [
{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'plugin/search/search.js', async: true },
{ src: 'plugin/zoom-js/zoom.js', async: true },
{ src: 'plugin/notes/notes.js', async: true }
]
});
</script>
</body>
</html>