learn d3 js

[Advanced series of D3.js-5.0] histogram, d3.js5.0 The Histogram is used to describe the probability distribution. D3 provides the Histogram layout Histogram for data conversion. Suppose there are arrays a = [10, 11, 11.5, 12.5, 13, 15, 19, 20 ~ The value range of 20 is divided into five segments: 10 ~ 12, 12 ~ 14, 14

[D3.js advanced series-9.0] interactive prompt box, d3.js9.0 In general, too many texts should not exist in charts. However, sometimes some text is required to describe certain graphic elements. Then, you can implement an interaction: When you move the mouse to a certain graphic element, a prompt box appears, containing the description text. This is a simple, uni

[D3.js pro series-4.0] matrix tree, d3.js4.0 A matrix tree (Treemap) is also an extension of hierarchical layout. areas are divided into rectangular sets based on data. The size and color of the rectangle are the reflection of data. As shown in figure 1, many portal websites arrange photos in rectangles of different sizes. This is the application of the matrix tr

[D3.js selection set and data details-4] processing method and processing template of enter and exit, d3.jsexit After data is bound, the selection set is divided into three parts: update, enter, and exit. What are the solutions for these three parts? This article describes the processing method and a common processing template.1. How to Deal with enter If there a

[D3.js advanced series-7.0] location, d3.js7.0 Sometimes you need to tell the user some goals on the map, if the target can be expressed by only one coordinate, it is called "annotation ".1. What is Annotation Annotation is an element that can be expressed by only one coordinate on a map. For example, draw a circle at the longitude and latitude (116, 39) and draw

[D3.js advanced series-6.2] drag and drop a pie chart, d3.js6.2 This article describes a more complex drag-and-drop application, that is, the drag-and-drop Pie Chart Section. In Chapter 9.1, I will explain how to create a pie chart. Each part of a pie chart is represented by an arc with width. When interacting with users, it is interesting to drag and drop each

[D3.js selection set and data details-2] bind data with data (), d3.jsdata In D3, data binding is mostly done by the data () function. How does it work? What is the difference between it and datum? The data () function can bind array items to each element separately and set binding rules. Data () can also handle the i

Learning D3.js (hereinafter referred to as D3) also has a period of time, run D3 do a few projects. I found that Chinese D3 tutorials very few, foreign materials but require a certain degree of English reading ability (recommended site: Http://bl.ocks.org/mbostock), so the g

Introduction and installation of "D3.js starter Series-0"Posted in 2014/06/12In recent years, visualization has become more and more popular, many newspapers and magazines, portals, news, media have a large number of use of visual technology, making complex data and text becomes very easy to understand, there is a proverb "a picture value in 1000 words", is indeed true. A variety of data visualization tools

D3 is currently a popular data visualization tool, through this article can have a preliminary understanding of D3. 1. What is D3? The full name of D3 is (Data-driven documents), as the name implies, is a data-driven document. Listen to the name a bit abstract, say simple, is actually a JavaScript function library, us

.js Foundation Understanding SVG Graph GraphingWhy do you want to learn SVG diagram? Because D3.js is called the jquery in SVG, of course, if you want to use D3 output canvas map can also, but SVG diagram operation more flexible, more convenient debugging, debugging in C

Objective D3.js is a JavaScript class library that helps developers manipulate data-based documents, in the "D3.js method of implementing a histogram." has been introduced to you how to use d3.js to achieve a simple histogram, to

background of the page to black:d3.select("body").transition() .style("background-color", "black");Or, to resize circles in a symbol map with a staggered delay:d3.selectAll("circle").transition() .duration(750) .delay(function(d, i) { return i * 10; }) .attr("r", function(d) { return Math.sqrt(d * scale); });By modifying only the attributes this actually change, D3 reduces overhead and allows greater graphical complexity in high Frame rates.

What is D3.js?Bottom line: D3.js is a JavaScript library that manipulates data!Start with a simple exampleLearning a new thing is very simple, we first, and then we will change its sentence, contrast the effect of the present to learn the effect of this property, OK, here is

First, install the D3.js1. Network connectionsrc="Https://d3js.org/d3.v4.min.js" >script> 2. Command-line installationCNPM | | NPM install d3--save = I'm using CNPM install D3--save3. Create a node serverA. CNPM | | NPM Install Express--save + = The previous tutorial has already said Express build server. The next tu

My personal blog is: www.ourd3js.comCSDN Blog for: blog.csdn.net/lzhlzzReprint please indicate the source, thank you.The production of maps is the most important part of the D3. Because in the data visualization, many things will be associated with the map, such as the population of China's provinces, the amount of GDP, etc., can be linked with the map.Ask the JSON file for the file you need to make the map in D3