chart js vs d3

. d:d.parent). name);}). On ("MouseOver", function (d) {d3.select (this). Style ("Fill", "Yellow");}). On ("Mouseout", function (d) {d3.select (this). Transition (). Duration ((). Style ("Fill", function (d) {return color ( D.children? d:d.parent). Name); });}); Rects.append ("text") . attr ("Class", "Node_text"). attr ("Transform", function (d,i) {return "Translate (" + (D.X+20) + "," + (D.Y+20) + ")";})

If you want to know more about D3.js, welcome to http://www.ourd3js.com/discussion D3 is a javascript class library for Data-Driven Documents. If you do not know what javascript is, learn about javascript first. To put it simply, D3.js is mainly used to operate data. It

When I first approached the use of D3.js, one of the most confusing places was data (), enter (), and exit () . After I have been in touch for a while and have some understanding, simply say what I understand.data ()Let's look at an example: Body > P > P > P > P > P > P > Body >Execute code:D3.select ("Body"). SelectAll ("P"). data ([1, 2, 3])Here, Data() is used to bind to the selected DOM ele

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 (for later simultaneous operation) To see a specific example, the following code is available:[HTML]View PlainCopy html> head> meta charse

China), just:[HTML]View PlainCopy Sp.text ("China"); Can. If you want to use the set to assign a value, to use function functions (d,i), the function of the first parameter means datum (data), the second argument is index (index), it is important to note that when data function data is specified The set of data set and the P set you selected are one by one corresponding (if the number of sets and p is exactly the same, the case will be discussed later). The function has only one

The first test of the successful D3.js code needs to be opened in the IE9 and above browsers. Firefox and Google can also try. Delete "20"rows="8"id="con">"运行代码"type="button"id="btn"/>Test the successful D3.js code

want to select the third There are two ways:(1) Assign an ID to the third id= "P3">Hello World 3p>Then choosevar sp = d3.select ("#p3"); // Select ElementYou can do it again.(2) If data is bound, it can be manipulated in function (D,i), for exampleSp.text (function(d,i) { if(i==2) { ... } // if i = = 0 and I = = 1 are not specified, the null value will be returned automatically });However, it is important to note that, in thi

use it this way:var link = svg.selectall (". Link"). data (links). enter (). Append ("path") . attr ("Class", "link") . attr ("D", diagonal);This draws the lines between all the nodes. Next we'll draw the node.Nodes are also drawn using the circle in SVG. This is no longer the case. I've already talked about it before. You can also view the source code yourself. The result diagram is:If you want to view the source code, please click on the following URL. Right-click the

("X2", function (d) {return d.target.x;}) . attr ("Y2", function (d) {return d.target.y;}); Node.attr ("Transform", function (d) { return "translate (" + D.x + "," + D.y + ")"; } ";});Here as in section 9.2, tick refers to the time interval, that is, every time interval after the refresh of the picture, the content of the refresh is written in the nameless function functions, the function is written in the contents of the drawing. Here you see, 第7-9 is used for panning, and the

setting the action distance of the gravitational force, exceeding this distance, there is no gravitational force. The default value is infinity.Gravity ()The center of the size function creates gravity, and each vertex moves toward the center, with a default value of 0.1. It can also be set to 0, without the effect of gravity.Theta ()If the number of vertices is too large, the calculation time will be increased (O (n log n)). The theta is meant to limit this calculation, and the default value i

D3.js is also a JavaScript framework, like jquery, except that his specialty is in the data visualization of this piece. So don't think the D3 is so complicated. In the above code we can see some of the uses of D3:Select element:d3.select ("element"), this is the $ () in jquery, but not in shorthand form.After creating

p.data (persons, function (d) {return d.id;}). Text (function (d) {return d.id + ":" + D.name;});There is only one statement return d.id in the key function. Represents a key using the ID property of an array item. After modifying the contents of the P element with the data of this binding, the result is as follows:As you can see, the results are not arranged in the order of the New Persons Array (6: Zhang San, 9: John Doe, 3: Harry). As shown in binding procedure 1, the order of the bindings d

simplified version of GeoJSON, which can be said to be a GeoJSON child. The author of D3.js thinks GeoJSON is not very good, and it is more admired Topojson format.Topojson compared to GeoJSON, the file size is reduced by 80% because: The boundary line is recorded only once (for example, the junction lines in Guangxi and Guangdong province are recorded only once) Do not use floating-point numb

In the "Advanced-Chapter 1.0" explains how to use the text and Tspan in SVG to achieve the function of line wrapping, this article on this feature is encapsulated, can be used directly later.1. Reference JS file: Multext.jsAfter downloading, refer to the or directly through the URL reference:Of course, to use this file, you should also refer to the D3 library:2. Parameters of the functionOnly one function A

D3.js Data Visualization Practical Manual study notesThe interpolator interpolation a given range of values and prints it in the middle.Character interpolation var data=[];var sizescale=d3.scale.linear (). Domain ([0,9]). Range (["Italic bold 12px/30px Georgia, serif", "Italic bold 120px/180px Georgia, serif "]); for (Var i=0;iColor interpolation var

(). Append ("Tspan"). attr ("X", Text.attr ("X")). attr ("dy", "1em"). Text ( function (d) {return D;});The results are as follows:Complete.The complete code can be found in the following links, right-click on the source code:Http://www.ourd3js.com/demo/G-1.0/tspan.htmlThank you for reading.Document Information Copyright Notice: Attribution (by)-Non-commercial (NC)-No deduction (ND) Published: December 28, 2014 More content: our D3.

We don't say much, this article mainly introduces the use of D3.js packaging text to achieve the function of automatic line-wrapping, let's take a look together. I. Referencing multext.js documents Multext.js function Appendmultitext (container, str, POSX, posy, Width, fontsize, fontfamily) {if (Arguments.length Can be saved as later, referenced in the label: Of course, to use this

Website: http://d3js.org/Example: Https://github.com/mbostock/d3/wiki/GalleryReference: Online reference //or download to local Begin: D3.select implementing a single element selectionSelect.attr, reading/Setting element properties select.classed, adding/removing element classes Remove the P1 class for P tags　　D3.

summarize the installation process for a D3.js deployment node environmentPreparation phase:first, the computer to install the node environment, this stage filtered out, if the node environment is not installed, then do not play based on the node environment and other things. Build the Environment:I create a project directory D3node in my own F: System disk, and then create a Package.json file that is confi

"; Arrowmarker.append ("path"). att R ("D", Arrow_path). attr ("Fill", "#000")//Draw the horizontal, vertical axis and add the arrow graphics.append ("line"). attr ("Stroke", "Black"). attr ("Stroke -width "," 1px "). attr (" x1 ", 0). attr (" Y1 ", Max_height). attr (" X2 ", Data.length*rect_step). attr (" y2 ", max_height) . attr ("Marker-end", "url (#arrow)") Graphics.append ("line"). attr ("Stroke", "Black"). attr ("Stroke-width", "1px"). A TTR ("x1", 0). attr ("Y1", Max_height). attr ("X