The best solution would be to run a server on your computer to make it work. The simplest way to have a local web server, as explained here is to run this command in the directory where you have your source code: python -m SimpleHTTPServer 8888 & Then just load the page http://localhost:8888
Use d3.text to load the data, and then d3.csvParseRows to parse it. For example: d3.text(“data/testnh.csv”, function(text) { console.log(d3.csvParseRows(text)); }); You’ll probably also want to convert your columns to numbers, because they’ll be strings by default. Assume they are all numbers, you could say: d3.text(“data/testnh.csv”, function(text) { var data = d3.csvParseRows(text).map(function(row) { return row.map(function(value) { return … Read more
In your particular case you can simply use d to position the tooltip, i.e. tooltip.html(d) .style(“left”, d + “px”) .style(“top”, d + “px”); To make this a bit more general, you can select the element that is being moused over and get its coordinates to position the tooltip, i.e. tooltip.html(d) .style(“left”, d3.select(this).attr(“cx”) + “px”) .style(“top”, … Read more
You can use a recursive function to go through the whole tree: getDepth = function (obj) { var depth = 0; if (obj.children) { obj.children.forEach(function (d) { var tmpDepth = getDepth(d) if (tmpDepth > depth) { depth = tmpDepth } }) } return 1 + depth } The function works as follow: If the object … Read more
More generally, if the user interacts with element A, how do you select (and then modify) related elements B? There are many ways of achieving this, but here are three common approaches. Option 1. For one-to-one mappings, select by id. If each element in A has exactly one corresponding element in B, you can select … Read more
UPDATE 05/04/2018: It is my understanding d3 has changed a lot (for the better) to be a lot more modular. For those who are looking towards this answer, this was using a much older version of d3 (specifically v3). A lot of the findings are still relevant for the d3-hierarchy package under cluster.size() and cluster.nodeSize() … Read more
Remember that the key function will be invoked on each element of your data array (i.e. dt), as well as on each element in your selection (i.e. d3.selectAll(“.input”)). In both cases, the key function needs to return a valid value and those output values will used to make the association. To achieve your goal you … Read more
Using the example of histogram from the following question: Bar chart with negative values I inversed x and y and adapted the display. Now you have a nice basis. Here is the corresponding jsFiddle: http://jsfiddle.net/chrisJamesC/tNdJj/4/ Here is the relevant code: var data = [-15, -20, -22, -18, 2, 6, -26, -18]; var margin = {top: … Read more
This is a fairly complex question. The answer will differ based on the spatial reference (SRS, or coordinate reference system(CRS)) system you are looking at and what your ultimate goal is. I am using d3.js v4 in this answer Short Answer: For example, how would you know what projection, degree of rotation or bounding box … Read more
This question has been asked several times before. The solutions I have suggested there is to rotate the label but it has never quite satisfied me. Part of it was the horrible font rendering done by some browsers and loss in legibility that brings and the weird flip when one label crosses over the 180° … Read more