d3 js book

rectheight =; // the pixel height of each rectangle (including white space) Svg.selectall ("rect"). data (DataSet). Enter () . Append ("rect"). attr ( "x") . attr ("y",function(d,i) { return i * rectheight; }) . attr ("width",function(d) { return D; }) . attr ("height", rectHeight-2) . attr ("Fill", "steelblue");This code adds the same number of rectangles as the length of the dataset array, using the following statement:Svg.selectall ("rect")

) {return"Enter" +D; });As a result, the data that is bound by the Update section and the Enter section is clearly represented.　　　Please remember: The update section is handled in the following way: Updating property values The Enter section is handled in the following way: When an element is added, the property value is assigned Iii. use of Update and ExitWhen the corresponding element is too large (the number of bound data Now there are three P elements i

My personal blog homepage is: http://www.ourd3js.com/. CSDN Blog Home for: http://blog.csdn.net/lzhlzz/. Reprint please indicate the source. Thank you.Here's how to start with D3.js to deal with the first simple question, first look at the following code:Suppose you have studiedHTML, you should know that two lines of text will be printed on the screen. For example, with:Suppose you want to useJavaScriptTo c

If you are interested in D3.js or data visualization, welcome to www.ourd3js.com for discussion. Next I will discuss how to select elements and use data.The page now contains three lines of text with the code: Hello World 1Hello World 2Hello World 3 Defines a set with three elements: var set = ["I like dog","I like cat","I like snake"]; Use these three strings to give the preceding three strings respectiv

By using d3 and js to visualize data, data can be separated from code to facilitate data modification in the future. This time, a five-dimensional Radar chart is drawn using d3.js, which compares the five attributes of multiple objects on one map. Data is written into data.csv1_data source and written into the type.c

Enter-update-exit mode Select.data (data), which represents the intersection of the selection graph with the data->update ModeSelect.data (data). Enter () to exclude the intersection of selection graphics with data data on behalf of data->enter ModeSelect.exit, removes all data, representing parts of the selection graph->exit ModeE-U-E is the foundation of D3.jsArray Data binding var data=[10,15,24,46,13,6,96,12,44,61,17];function render (

follows:var body = D3.select ("body"); // Select Body (the first body, of course, only one body) var h1 = Body.select ("H1"); // Select the first H1 var all_h1 = Body.selectall ("H1"); // Select all the H1To prove that the above variable H1 selected the first H1.style ("Color", "red");Color the selected elements of the H1 variable, plus this sentence, you will find the result:As a result, you can prove that the first If you

"). SelectAll ("P");//Get update part var update = P.dat A (DataSet);//Get Enter part var enter = Update.enter ();//update part: Update property value Update.text (function (d) { return "update" + D ;});/ /enter: Adds an element and assigns the attribute value Enter.append ("P") . Text (function (d) { return "enter" + D; });The results are as follows:Update 3Update 6Update 9Enter 12Enter 15So:The update section is generally handled by updating the property valueThe method of hand

[D3.js getting started series-10.3] Difference and connection between GeoJSON and TopoJSON files, geojsontopojson My personal blog is: www.ourd3js.com The csdn blog is blog.csdn.net/lzhlzz. Please indicate the source for reprinting. Thank you. A friend left a message a few days ago asking about the relationship between the GeoJSON file and the TopoJSON file. I am not very clear about it. After some queries

Objective Having learned about the basic development and components of d3.js, we began to apply its exciting point: gorgeous predefined graphics, the application of d3.js, we in its sample files based on a little change can be applied to our data visualization, d3.

If you are interested in D3.js or data visualization, welcome to www.ourd3js.com for discussion. My blog homepage is: http://blog.csdn.net/lzhlzz, reprinted please indicate the source, thank you. In D3.js, there are two functions for selecting elements: select and selectAll. First, describe their differences: Selec

My personal blog home: http://www.ourd3js.com/, csdn Blog home for: http://blog.csdn.net/lzhlzz/.Reprint please indicate the source, thank you.In D3.js, there are two functions for selecting an element: Select and SelectAll.Let's start by explaining their differences: Select is the first selection of all specified elements SelectAll is the selection of all of the specified elements (to be used

Interested friends Welcome to http://www.ourd3js.com/DiscussionNow let's start with D3.js to deal with the first simple question, and look at the following code:If you have studiedHTML, you should know that two lines of text will be printed on the screen, such as:If you want to useJavaScriptTo change these two lines of text, what to do? We will add the code into:The result becomes: As you can see, using Jav

Let's take a look at the effect chart. Directly below the source code, HTML file Linechart.js is responsible for loading and refreshing the line chart function Loadlinechart (ElementID, DataSet) {var svg = D3.select ("#" + ElementID); var STRs = svg.attr ("Viewbox"). Split (""); alert (dataset); var width = strs[2]; var height = strs[3]; Outer box var padding = {top:50, right:50, bottom:50, left:50}; var names = new Arra

) . attr ("height", height);-First circle, required to move x-coordinatevar circle1 = svg.append ("Circle"). attr ("CX"). attr ("Cy"). attr ("R", "G") . Style ("Fill", "green"); // changes the center coordinate from 100 to 1 seconds (1000 milliseconds) circle1.transition () . Duration() attr ("CX", 300);-The second circle, which requires both moving the x-coordinate and changing the colorvar circle2 = svg.append ("Circle"). attr ("CX"). attr ("C

() when the corresponding element is too large (the number of bound data When the corresponding element is too large, it is usually necessary to delete the element so that it is equal to the number of bound data. The back is usually followed by the remove operation.Here's a look at the specific usage:[JavaScript]View PlainCopy The above code uses the variable name update and enter respectively to represent the respective part, the result of the above code is:The resu

Original link:Http://d3.decembercafe.org/pages/lessons/3.htmlParse the data and datum principle: Datum (): Binds a data to a selection set Data (): Binds an array to the selection set, and the values of the array are bound to each element of the selection set, respectively When printing, it is found that the attributes of each P element will be one more __data__, and the corresponding data will be bound on this property.Datum ()

# # # DEMO1 Features * * * Support node drag and Drop * Support node drag and hold position * Support mouse floating to node display node information * Support mouse floating to node hide unrelated nodes and lines * Support canvas Overall zoom move # # # Demo2 function * * * support node drag and Drop * Support node drag and hold position * Support mouse floating to node display node information * Support double node hide unrelated nodes and lines can accumulate double-click Nodes * Su

It is not difficult for d3.js to draw a vector chart. it is difficult to drag and drop it. In fact, jquery and easyui both provide the draggable drag and drop method, you only need to re-draw the line when dragging the drop event of a div. It is not difficult for d3.js to draw a vector chart. it is difficult to drag an

Use D3.js Library to implement Focus+context line chart, read DATA.TSV file dataIndex.htmlAs follows: Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced. "D3.js" Focus + Context Line chart