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[D3] Margin Convention with D3 v4

You can’t add axes to a chart if you don’t make room for them. To that end, the D3 community has adopted a simple convention for defining margin sizes that shields most of your code from having to know or care about them. This lesson demonstrates the…

D3.js 入门学习(二) V4的改动

//d3.scan /* 新的d3.scan方法对数组进行线性扫描,并根据指定的比较函数返回至少一个元素的索引. 这个方法有点类似于d3.min和d3.max. 而d3.scan可以得到极值的索引而不仅仅是计算极值. */ var a1 = [1,3,5,2,9]; var i = d3.scan(a1,function(a,b){ return b-a; // 返回最大值的索引, a-b; 返回最小值的索引 }); console.log(i); //4; //d3.ticks d3.tick…

[D3] Drawing path in D3

Here we have a force layout with three nodes. In the example, we will link three nodes with line and path: import React, {Component} from 'react'; import * as d3 from 'd3'; const nodesData = [ {name: 'Alice', id: 0}, {name: 'Eve', id: 1}, {name: 'Bob…

D3学习之：D3.js中的12中地图投影方式

特别感谢:1.[张天旭]的D3API汉化说明.已被引用到官方站点: 2.[馒头华华]提供的ourd3js.com上提供的学习系列教程,让我们这些新人起码有了一个方向. 不得不说,学习国外的新技术真的是一个非常艰苦的过程. 在学习D3绘制地图的过程中.有朋友建议看一下当中投影的说明比較好.于是,凭借我这半吊子不到的英文水平,大致给翻译了下来,仅供參考: 原文链接:https://github.com/mbostock/d3/wiki/Geo-Projections#albers D3中一共提供了1…

[D3] Reuse Transitions in D3 v4

D3 transitions start executing as soon as they’re created, and they’re destroyed once they end. This can present some challenges when attempting to create reusable transitions. This lesson demonstrates how to overcome those challenges using various a…

[D3] Animate Transitions in D3 v4

D3 makes it easy to add meaningful animations to your data visualizations. Whether it’s fading in new items or tweening existing shapes to display new values, adding transitions is easy. This lesson shows you how to add animations while building on y…

[D3] Basic Interactivity with D3 v4

Data visualizations are a lot more interesting when they’re interactive. Whether it’s clicks, roll overs, or drags, it makes things more compelling, and D3 is up to the task. This lesson demonstrates how to implement basic interactions and shows how…

D3.JS V4 绘制中国地图

参考:http://bl.ocks.org/almccon/fe445f1d6b177fd0946800a48aa59c71 http://blog.csdn.net/lzhlzz/article/details/38727993    代码: <!DOCTYPE html> <meta charset="utf-8"> <style> .states :hover { fill: red; stroke-width: 2px; } .state-b…

[D3] Build an Area Chart with D3 v4

Similar to line charts, area charts are great for displaying temporal data. Whether you’re displaying a single set of data or multiple sets using an overlapping or stacked layout, D3 provides APIs to make the process straightforward. This lesson walk…

[D3] Build a Line Chart with D3 v4

Line charts are often used to plot temporal data, like a stock price over time. In this lesson we’ll see how to use D3 APIs to create our own simplified version of the charts seen on Google Finance. var margin = { top: 10, right: 20, bottom: 65, left…