d3 js tutorial

("Path.country"). attr ("Class", "Country")//color the map block, the z-parameter of the function, which is the data object of the corresponding element (assigned by the data () function that was previously called). Style ("Fill ", function (z) {if (C.mapdisplaymode = =" Countries ") {//or for a specific length of time, data structure in data.min.jsvar y = MAPTIMEDATA[C.MAPSCOPE][C.MAPD Isplaymode][z.id].t;var x = d (y); Judging the color level return x} else {return c.mapoptions[c.mapdisplay

== ' rect ') {var w = random (100) +20; var r = g.append ("rect"). attr ("Class", "Child"). attr ("X", Random (W idth). attr ("Y", random (height)). attr ("width", W) . attr (' height ', W). attr ("Fill", Colors (count)); Count + +; }//random lines else if (cmd== ' line ') {var l= g.append ("Line '). attr ("Class", "Child"). attr ("x1", random (width)) . attr ("Y1", random (height)). attr ("X2", Random (width)) .

the SVG range of issues * * So, in the tutorial, all use this method */function Buildtip (data) {var t = "#tooltip"; Chinag.selectall ("path"). Data (data, function (d) {return d.id; }). On ("MouseOver", function (d) {d3.select (T). Style ("left", d3.e Vent.x + "px"). Style ("Top", D3.

D3.js overall presentation, d3.js overall Recently, I have studied some visual presentations on the network relationship diagrams of social members. I am unable to grasp the big data visualization of this desert. Fortunately, I found D3, a vibrant oasis, I decided to have a

D3 learning: Map Projection Method in 12 in D3.js, d3d3. js Special thanks: 1. The D3API Chinese description of [Zhang tianxu] has been referenced on the official website; 2. The course series provided by [Shantou Hua] On ourd3js.com gave us at least one direction for these newcomers. I have to say that learning new te

Data Visualization and D3.js, data visualization D3.jsData Visualization Data visualization is a topic for how to better present data. After the emergence of big data, it becomes more important and urgent. Previously, using excel for column charts, pie charts, and line charts was one of the most commonly used data visualization methods. On the WEB end, the popula

Tall and essential! Analysis of D3.js contribution to products and d3.js contribution In this era of talking with data (the age of relying on faces to eat), there is no good presentation form (not a handsome and clear face) and the impact on the entire product, that's simple... In the field of data visualization comp

[D3.js advanced series-5.1] color interpolation and linear gradient, d3.js Interpolation Color interpolation provides two RGB color values. The values between two colors are calculated using the interpolation function. A linear gradient is a filter added to an SVG image. You only need to give the color values at both e

[D3.js entry series, d3.js entry series My personal blog is: www.ourd3js.com The csdn blog is blog.csdn.net/lzhlzz. Please indicate the source for reprinting. Thank you. Pack is used to contain the relationship with the object to be included. It also indicates the weight of each object. A circle is usually used to repr

[D3.js advanced series-1.0] text line feed and d3.js line feed Adding text in SVG uses text elements. However, this element cannot be automatically wrapped, and the excess content cannot be displayed. What should I do? Preface to the advanced series Start to write Advanced series tutorials today. In other words, due to

[D3.js data visualization practices] -- (1) Draw gridlines and d3.js Grids We often use regular charts (histograms, line charts, and so on) to present data. To clearly indicate which value range of the data on the number axis, the value is directly indicated in the rectangle and point. In addition to this method, you c

[D3.js advanced series-1.2] solution for garbled characters when reading CSV files, d3.jscsv When d3.csv is used in D3 to read CSV files, garbled characters may occur. How can this problem be solved?1. garbled Problem When reading the xxx.csv file using

[D3.js advanced series-1.1] Reading of other table files, d3.js1.1 CSV table files use commas as unit delimiters, other TSV files with Tab as unit delimiters, and table files with other manually defined delimiters. This article describes how to read them in D3.1. What is a TSV table file? TSV (Tab Separated Values), tabulation delimiter value, which is different

[D3.js selection set and data details-5] processing template application, d3.js details In [select set and data-4], a processing template for update, enter, and exit is introduced. This template is very common. This article will explain its usage through an example.1. Template Review the template mentioned in the previ

[D3.js advanced series-8.0] marking and d3.js series 8.0 Marking Sometimes, you need to draw a line on the map, which means "from somewhere to somewhere". In this case, the line drawn on the map is called "". 1. What is the marking line? A baseline is an element on a map that requires more than two coordinates. For ex

[D3.js advanced series-6.0] Drag and drop applications (Drag) and d3.jsdrag Drag (Drag) is an important interactive method. This article describes how to use Drag and drop.1. Definition of drag D3.behavior. drag () can be used in D3 to define the drag behavior. var drag =

[D3.js advanced series-4.0] Draw arrows, d3.js4.0 Drawing in the SVG drawing area, when drawing a line and curve, you often need to add an arrow somewhere. This article describes how to add arrows to straight lines and curves in D3. So far, we have drawn D3 charts in the S

[D3.js pro series-1.0] Reading CSV table files, d3.jscsv In the tutorials of the Getting Started series, we often use d3.json () functions to read files in json format. The json format is very powerful, but it may not be suitable for common users. Common users prefer table files generated using Microsoft Excel or OpenO

[D3.js advanced series-3.0] partition graph, d3.js3.0 The Partition graph is also a Layout of D3 ). This layout is very interesting. It can be made into a square or a circle. This article first introduces how to create a square partition graph, which is also the most basic form of a partition graph. A partition chart

[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