d3 js charts

-values");As you can see, they are actually D3.DSV functions. So what is this DSV function about? A DSV can actually read a table file with any character or string as a delimiter . Let's try using the DSV function to read a table file with a semicolon as a delimiter. Suppose you have the following file:Name;age Zhang San; 22 John Doe; 24Read the following code:var DSV = D3.DSV (";", "Text/plain");d sv ("TAB

end angle , and the original integer .This data is suitable for making pie charts. This is the function of Layout. But be careful. In the actual drawing, there is still a need for other methods of drawing.We can use the method of arc to make pie chart, because the curve has the thickness, adjust the thickness to become a pie chart, the following we add such as the following code:var Outerradius = Width/2;var Innerradius = Width/4;var arc =

value3. Use of Update and ExitWhen the corresponding element is too large (the number of bound data Now there are three P elements in the body, to bind an array of length less than 3 to the selection set of p, and then handle both the update and exit respectively.varDataSet = [3 ]; //Select the P element in bodyvarp = D3.Select("Body"). SelectAll ("P"); //Get the Update sectionvarUpdate =p.data (dataset);//Get exit SectionvarExit =update.exit ();//ha

, returns a red value of 1 o'clock, and returns green. When the value is from 0 to 1, the color between red and green is returned. If the input value exceeds 1, the return is green and the value is less than 0, then the red is returned, which is determined by the order in which the parameters are passed when the D3.interpolate (A, b) is called.Document Information Copyright Notice: Attribution (by)-Non-commercial (NC)-No deduction (ND) Pu

1. Basic commands for loading dataD3 provides methods to load different data types, such as D3.text (), D3.xml (), D3.json (), D3.csv (), and d3.html ().DOCTYPE HTML>Head> Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /> title>Testtitle> Scr

put a good map of China on it and share it with you.GeoJSON file for map of China: China.jsonThis file is used Natural Earth data, after extraction made, I also removed a lot of useless information, only the Chinese provinces of the name and ID number, here first thanks to the data provided by Natural Earth. Next I will extract data from other countries and put it on a personal blog for everyone to share, hoping to save everyone's time because this part is really troublesome. For a friend who o

). attr ("width", "attr"). Style ("Fill", "url (#" + lineargradient.attr ("id") + ")");//Add text var Minvaluetext = Svg.append ("text"). attr ("Class", "ValueText"). attr ("x"). attr ("Y", 490). attr ("dy", " -0.3em"). Text (function () { return minvalue;}); var maxvaluetext = svg.append ("text"). attr ("Class", "ValueText"). attr ("x"). attr ("Y", 490). attr ("dy", " -0.3em"). Text (function () {return maxvalue;});5. ResultsThe results are as follows,The full code opens the following link, rig

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 what we want to do: Does it look quite compl

, and so on. However, these values are discrete, the linear scale is not suitable, and the ordinal scale is required.var ordinal = d3.scale.ordinal () . Domain (index) . Range (color); ordinal (0// back to Redordinal(2// return Greenordinal (4// return Black　　ordinal scale: d3.scale.ordinal (); usage is similar to linear scale.3. Application:"Utf-8"> It is mainly the application of the two pi

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 inj

"). Text (function (d) {return d.name;});As shown in result 5. Thanks to the most high-speed rail lines in Beijing, the most densely connected circle in Beijing is like tying a lot of ropes here.Figure 5When nodes and wires become much more complex, it becomes an example at the beginning of this article. As I said at the beginning of this article, the completion of that example is too high to provide a reference at all. I hope the example of this article can give you a reference example of bundl

) {return width-padding.right*0.8;}). attr ("Y", function (d,i) {return padding.top * 2 + labheight * i;}). attr ("dy", LABRADIUS/2). Text (function (d) {return d.name;});Use circles and text as labels to add to the right side of the chart. As shown in final result 4.Figure 4Full code Please click the following URL, and then right click to view the source code:Http://www.ourd3js.com/demo/G-3.0/stack.htmlThank you for reading.Document Information Copyright Notice: Attribution (by)-Non-co

Before writing a demo There are some things to use D3 to achieve some effects but in many forums to find resources can not find the way to use the d3.js in Vue, npm above the D3 relatively speaking is very impersonal no say on webpack how to use D3.jsFinally, a long time to

A server to do mobile app application in a cloud, very curious if you do not modify the SSH port, how many times a day will be violently cracked? With this question, look at the/var/log/messages log, grep How many of the "Failed" in the log records ...Because the messages log will have logrotate, so:grep "^mar 1"/var/log/messages* |grep "Failed" | Wc-lGet the number of violent hacks from 1th to 7th respectively this month, respectively:2015-03-07,41262015-03-06,334992015-03-05,800962015-03-04,70

D3 is a visual JS library based on data operation, understanding D3, from the most basic display can be loaded data talk about.The basic framework of HTML is not much to say, first the code again explained:Create a new test directory that creates a demo and D3 two folders in this directory. Demo store the HTML file to

First, put the effect map out: With a histogram of the basic elements: column, axis, scale, value and so on. It has to be said that D3.js is more troublesome than the echarts of direct use, but it is more free. Let's see how it's going to happen. Determine the size of the canvas var width = 400; var height = 400; Add an SVG canvas to the body-var svg = D3