News Articles D3.js

Mouse Hover over circle data point in D3.js. Iam trying to put some hover functionality but its not reflecting. How to show data when over datapoint

[Original code link. Please provide your suggestion][1] link[1]: https://plnkr.co/edit/Va1Dw3hg2D5jPoNGKVWp?p=preview&preview Source: JavaSript – Stack Overflow

How to manipulate data inside a map value? [duplicate]

I have a map of the next format: {"Alabama" => Array(1)} key: "Alabama" value: Array(1) 0: 1997: 104811.9 1998: 110212 1999: 115680.1 2000: 119851.7 2001: 122915.5 2002: 127505 2003: 134152.6 …. State:"Alabama"} How can I manipulate the data inside of its array, so that I can have the next representation of the map? 0:{"Alabama" => […]

how to get the output on HTML [closed]

i followed a the same teaching video’s code,but he can get the x&y scale on his html,i cant.theres nothing on the page instead of a 400*400 cantsee block. i dont know Y; <!DOCTYPE html> <html> <head> <style> .axis path, .axis line{ fill: none; stroke:black; shape-rendering: crispEdges; } .axis text{ font-family: sans-serif; font-size: 11px; } </style> […]

d3 datapoint disappearing Error: <circle> attribute cx: Expected length, "NaN"

I’m trying to map several points on an interactive 3D globe using d3. The points show up at first, but after trying to rotate the globe, they disappear until the page is reloaded. This problem does not occur when I only use a pan/zoom feature. Here’s the code for adding the points: d3.csv("cities.csv").then(function(data) { svg.selectAll("circle").data(data) […]

Module not found: Can’t resolve ‘react-d3-graph’

So I’ve forked a project in order to add some additional features it didn’t have. I’ve got it referencing my github fork in my package.json, deleted and refreshed my node_modules, and deleted my package-lock.json files. I’ve done npm run build Whenever I try and do npm start, I get the error Failed to compile. Module […]

D3.js color with domain a set of colors and range a subset of colors

i’m trying to create a color scale with domain a list of colors and range a "sublist" of colors. Maybe is better to explain with an example. I would like a function such that color("#00FF00"), returns a different kind of green like for example dark green. This is because i need to catalogue a list […]

Add image to tooltip d3

I want to add an image to a tooltip with d3 and I have tried it with adding an html element. However, even if I input the right path in img tag (locally stored in the same folder) I got an error message that the file can’t be found. I also tried it with the […]

React throwing an error 128 when trying to download d3

So I’ve got a forked project I’m attempting to reference in my React code. I’ve noticed the package has a different version of d3 then my own (it uses 5.5.0, mine uses 6.6.2). Whenever I try and do npm install [email protected] I get these errors thrown npm ERR! code 128 npm ERR! An unknown git […]

D3 Js resize svg from exisiting example

I want to create an D3 Js gantt chart for the first time. I found a pretty good example which fits my expectations https://dk8996.github.io/Gantt-Chart/ (Example2). But I have problem resizing the svg. I want to fit the example into my d3 container which has a fixed height and width. The buttons of the example can […]

How to get a specific number of random entries from a JSON array?

I’m trying to show 10 random arcs using the globe.gl library. How can I load a random number of entries from a JSON array to achieve that? Currently, I have this code (full example on Codepen): const capitalsUrl = "https://raw.githubusercontent.com/fallenartist/playground/main/json/capitals.json"; const world = Globe()(document.getElementById(‘globe’)); fetch(capitalsUrl).then(res => res.json()).then(capitals => { const dl = capitals.features.length; rand = […]

D3 Enter Update Pattern for SVG pattern fills with custom image URL

I am trying to implement a D3 force graph with circles and custom pattern fills using images stored in my local DB. My entire implementation is driven by a CSV file which stores the URL for the images in my DB. In my HTML, I have a dropdown menu to switch between the 2 CSV […]

Use forked open-source project in react

So I’m needing to fork from "react-d3-graph" in order to implement and correct some features for a project I’m working on, i.e. zoom and highlightDegree, and implement it into my react project. I’ve got the project forked into my personal GitHub, I’m just unsure on how I’d implement my version instead of the original in […]

What is the most efficient way to display a big topojson file?

I am displaying a map with d3.js. First, I load some topojson data that shows the neighborhoods boundaries of a city. With this data, I created the projection, scale and translate values. Second, I loaded another topojson file that shows the streets of that same city. I used the same projection, scale and translate values […]

vue + d3 globe: this.canvas.on is not a function

I try to implement this globe in vue: https://codepen.io/Share2U/pen/dyWQoGv, building on this question: d3.js | projection.rotate() return value [NaN, 0, 0] I got the globe to display. Trying to add mousevents to the canvas, however, I get a "TypeError: this.canvas.on is not a function". <template lang="html"> <div class="map" style="width:100vw;height:100vh"> <canvas ref="globe"></canvas> </div> </template> <script lang="js"> […]

this.canvas.call is not a function (vue.js + d3.js)

I try to implement this globe in vue: https://codepen.io/Share2U/pen/dyWQoGv, building on this question: d3.js | projection.rotate() return value [NaN, 0, 0] I got the globe to display. Trying to add mousevents to the canvas, however, I get a "TypeError: this.canvas.on is not a function". <template lang="html"> <div class="map" style="width:100vw;height:100vh"> <canvas ref="globe"></canvas> </div> </template> <script lang="js"> […]

How do I optimize my code to get better fps in my React web application? [closed]

For a hobby project I want to visualize the current crypto market in bubbles. The idea is to clone cryptobubbles.net. I’ve already made a prototype at the moment, but the frames are on the low side. How can I optimize my code to get more frames? The application is made in JavaScript with react and […]

D3 Line Chart Color Gradient based on Temperature Data

I have implemented this line chart in VS code. I would like to add a gradient like this to the blue curve, but I want the color to vary based on the value of another variable (weather temperature data). Does anyone know how to implement this? Source: JavaSript – Stack Overflow

Best way to use recent D3 versions to produce PNGs from node.js?

I’m wanting to use d3 server side to create PNG files, directly or via SVG. I can find a number of discussions here about how to achieve this, but they’re all from many years ago, referring to d3 v3 or v4, and node back to v10. Is it still necessary to pretend we’re in a […]

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Senior Software Developer

Creator of @LzoMedia I am a backend software developer based in London who likes beautiful code and has an adherence to standards & love's open-source.