d3 js visualization

Learning is really a wonderful thing. I've seen this book before, and some of the knowledge points are completely out of the picture.Summary: The use of knowledge to study well, usually can understand the basis of other technologies, the relevant information and difficulties recorded.JavaScript traps1, variable type var myName = ' SFP '; typeOf myName; ' String ' 2, variable elevation for (var i=0; iSvgYou need to specify width,height for SVG; the element's attribute values are not unit

pass the set itself to the drag function. Var circles = [{cx: 150, cy: 200, r: 30}, {cx: 250, cy: 200, r: 30},]; var svg = d3.select ("body "). append ("svg "). attr ("width", width ). attr ("height", height); svg. selectAll ("circle "). data (circles ). enter (). append ("circle "). attr ("cx", function (d) {return d. cx ;}). attr ("cy", function (d) {return d. cy ;}). attr ("r", function (d) {return d. r ;}). attr ("fill", "black "). call (drag); /

arrows using the preceding marker is: // Draw a straight line var line = svg. append ("line "). attr ("x1", 0 ). attr ("y1", 0 ). attr ("x2", 200 ). attr ("y2", 50 ). attr ("stroke", "red "). attr ("stroke-width", 2 ). attr ("marker-end", "url (# arrow)"); // draw the curve var curve_path = "M20, 70 T80, 100 T160, 80 T200, 90 "; var curve = svg. append ("path "). attr ("d", curve_path ). attr ("fill", "white "). attr ("stroke", "red "). attr ("stroke-width", 2 ). attr ("marker-start", "url (# 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

){ return d.name + " " + d.gdp; }); Result 4. Figure 4 For the complete code, click the following link and right-click to view the source code: Http://www.ourd3js.com/demo/G-4.0/treemap.html 4. Conclusion So far, all the la s in D3 have been explained. The [entry series] describes 6 la S, 2 [advanced series], and 3 [advanced series], with 11 la s in total. D3 provides a total of 12 la S: Pie, Force, Chor

added, the result is as follows: As the boundary is limited, after adding more data, the rectangle will be out of the boundary, but it does not hinder the meaning of this article. You can right-click the following URL to view the source code: Http://www.ourd3js.com/demo/template.html Thank you for reading.Document Information Copyright Disclaimer: BY-non-commercial (NC)-deduction prohibited (ND) Published on: February 1, February 7, 2015 More content: OUR

);}). on ("mouseover", function (d) {d3.select (this ). style ("fill", "yellow ");}). on ("mouseout", function (d) {d3.select (this ). transition (). duration (1, 200 ). 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) + ")";}).

(d, I) {return I * rect_step + rect_step/2 ;}). attr ("y1", max_height ). attr ("x2", function (d, I) {return I * rect_step + rect_step/2 ;}). attr ("y2", max_height + 5); // draw the graphics text. selectAll ("text "). data (data ). enter (). append ("text "). attr ("font-size", "10px "). attr ("x", function (d, I) {return I * rect_step ;}). attr ("y", function (d, I) {return max_height ;}). attr ("dx", rect_step/2-8 ). attr ("dy", "15px "). text (function (d) {return Math. floor (d. x );});4.

(completely opaque) */tooltip.html (d. data [0] + "shipments:" + " D3.event. pageX and d3.event. pageY is the coordinates of the current mouse relative to the browser page. For the 3. Results As shown in the result, a prompt box is displayed when you move the mouse over Lenovo. Click the following link to view the source code by email: Http://www.ourd3js.com/demo/G-9.0/tooltip.html Thank you for reading.D

are still some functions for reading CSV files, which will be described in the following articles. Writing too much content at a time cannot be used. Thank you for reading. Document Information Copyright Disclaimer: BY-non-commercial (NC)-deduction prohibited (ND) Published on: February 1, October 03, 2014 More content: OUR D3.JS-data visualization special s

delete exit. remove (); In this Code, the exit part is deleted. After the deletion, no additional p elements exist in the webpage.3. process the Template After the last two sections, I learned how to process redundant data and elements. However, sometimes we do not know whether there are many data or many elements, or allow users to decide who is more and who is less. If you do not know the length of the array or the number of elements, you can define a processing template. See the following co

("markerUnits","strokeWidth") .attr("markerWidth","12") .attr("markerHeight","12") .attr("viewBox","0 0 12 12") .attr("refX","6") .attr("refY","6") .attr("orient","auto");startMarker.append("circle").attr("cx",6).attr("cy",6).attr("r",2).attr("fill","#000"); The ID of this flag is startPoint, And you can assign a value to the marker-start of the line segment. Modify the code for adding a

section, D3 has reserved locations for the Redundant Array item 12 and 15 for future operations. Enter contains an update variable pointing to the update section. There are no redundant elements in this binding, so there is no content in exit. If you replace the array: var dataset = [3]; The output result 6 of exit shows the two p elements. Figure 6 Thank you for reading.Document Information Copyright Disclaimer: BY-non-commercial (NC)-deduction pr

, places) {// Insert the grouping element var location = svg. selectAll (". location "). data (places. location ). enter (). append ("g "). attr ("class", "location "). attr ("transform", function (d) {// calculate the location of the annotation point var coor = projection ([d. log, d. lat]); return "translate (" + coor [0] + "," + coor [1] + ")" ;}); // insert a circle location. append ("circle "). attr ("r", 7); // insert an image location. append ("image "). attr ("x", 20 ). attr ("y",-40 ).

[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

. drag event Definition Every time a drag event is triggered, we only need to get the offset of the mouse and add it to the original offset dx and dy. Then use d3.select (this) to select the current element and apply transform to it to complete the translation operation. var drag = d3.behavior.drag().origin(function(d) { return d; }).on("drag", dragmove);function dragmove(d) {d.dx +=

(). duration (1, 500 ). attr ("d", function (d) {var o = {x: source. x, y: source. y}; return diagonal ({source: o, target: o });}). remove (); 2.4 Save the current node coordinates When you click a node, the data is updated, that is, the coordinates of each node are updated. However, you need to use the data before the update (source. x0 and source. y0) when performing the transition operation on the nodes and connections ). Therefore, the current node location must be saved every time you cal

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

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

A recent period of time to study the social members of the network diagram of some visual display, to the large data visualization of the desert helpless themselves, fortunately found D3 this vibrant oasis, I decided in this treasure place greedy for a feast. This article introduces mainly from the official website translation and after the user uses the Feeling data collection