updating a d3js line graph in real-time using JSON information

Trying to wrap my head around dynamically updating a line graph with new data, shifting the graph to the left and adding fresh data from the right - you following me? Want it to behave just like the examples on

I'm fairly new to d3 (javascript) and looking to incorporate external JSON data.

[
{"Values": ["1.59"], "Datetime": "2016-12-10 14:29:22.007"},
 {...}
{"Values": ["1.91"], "Datetime": "2016-12-10 14:29:23.230"},
 {...}
{"Values": ["0.52"], "Datetime": "2016-12-10 14:29:23.238"}
]

The examples I've come across mostly focus on generated data or replacing one file with another.

Is there a way to tackle this issue by working with just one json datafile and utilizing array methods?

Thanks in advance for any guidance!

d3.json("https://api.myjson.com/bins/1814gv", function (error, data) {
if (error) throw error;
// format the data
data.forEach(function (d) {
    d.Datetime = parseTime(d.Datetime);
    d.Values = +d.Values;

});
...

Check out the complete code example on jsfiddle

Answer №1

Welcome to Stack Overflow! It seems like your question could use some more specific details, especially when it comes to understanding the basics of D3 and data binding.

One common update pattern can be found in this example. When elements are added, updated, or removed from an array, the related bound elements in the SVG will reflect those changes.

In D3, the array index is typically used to determine where new data should be displayed. For instance, adding new data at the end of a line graph involves adding it to the end of the array. Is this what you mean by transitioning to the right?

If by "transition" you're referring to a visual change between states, there's an example in the code snippet you provided. The tooltip shifts from opacity 0 to 1 when hovering over a point.

It's generally helpful to mark an answer as correct if it solves your issue, or simply upvote responses that were useful. Without more specific details, it might be challenging for someone to give a precise answer due to the broad nature of your question.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What is the best way to import a geojson file into Express.js?

I'm currently trying to read a geojson file in Node.js/express.js. The file I am working with is named "output.geojson". I want to avoid using JSON.parse and instead load it using express.js (or at least render it as JSON within this function). var o ...

Error: The function $(...).maxlength is not recognized - error in the maxlength plugin counter

I have been attempting to implement the JQuery maxlength() function in a <textarea>, but I keep encountering an error in the firefox console. This is the code snippet: <script type="text/JavaScript"> $(function () { // some jquery ...

React powered interactive tables

I am in the process of creating a dynamic table using React, and here is the data structure I am working with: { numRows: 2, numCols: 3, cells: [ { id: 1, pos: { row: 1, col: 1 }, content: 'This is th ...

Create independent SVG files using Meteor and iron-router

My goal is to use Meteor and Iron-Router to serve dynamic SVG files with templating capabilities. To start, I create a new route: @route 'svg', { path: '/svg/:name' data: -> { name: this.params.name } # sample data layoutT ...

Clean coding techniques for toggling the visibility of elements in AngularJS

Hey everyone, I'm struggling with a common issue in my Angular projects: app.controller('indexController', function ($scope) { scope.hideWinkelContainer = true; scope.hideWinkelPaneel = true; scope.headerCart = false; scope. ...

The variable process.env.CLIENT_ID is functioning correctly within a function, but does not work when declared as a global

Trying to implement oAuth for Google API Using .env file to hide sensitive variables with .gitignore Facing an issue when trying to define the CLIENT_ID variable globally CLIENT_ID = process.env.CLIENT_ID When I run and log the variable outside of a fun ...

The function in Swift that allows for escaping

I recently tried following a tutorial on YouTube that demonstrated how to retrieve data from a JSON file. However, I found some of the steps confusing. Here's the specific function being used: func fetchJSONData (completion: @escaping () -> ()) { ...

Enhancing Struts2 JSON Plugin: Including ActionMessages, ActionErrors, and FieldErrors in the response

While working on my jQuery Ajax posts, I want to include any actionmessages, actionerrors, and fielderrors in the response (in JSON format). Here is what I added: <result name="input" type="json"> <param name="ignoreHierarchy">false&l ...

Autocomplete feature in Material-UI does not trigger the onChange event when a chip

I've encountered a quirk with the Material UI Autocomplete component. It seems that when I delete a tag directly from the chip using the (x) button, the onchange function of the autocomplete isn't triggered. Does anyone know how I can ensure that ...

Is there a way to extract only the titles from this JSON array? (using JavaScript/discord.js)

How can I extract the "title" values from this JSON array using JavaScript? I need to retrieve all the "title"s and store them in a new array like shown below: array( `hey title1`, `hey title2`, ... ) I am unsure of the number of titles we will receive, b ...

Modifying TextField color in a react application with Material UI

I have a react component that consists of a text field and a button. I want these elements to be displayed in green color on a black background, but I am unable to modify the default colors of all the elements. Following a similar query on how to change th ...

Consolidate all data connected to the specified key from a JSON dataset

Looking at the json string presented below [{"_id":"9/17/2015","amt1":0,"amt2":13276.5},{"_id":"9/18/2015","amt1":8075,"amt2":6445.5}] The expected outcome is: [{"_id": ["9/17/2015", "9/18/2015"], "amt1": [0, 8075], "amt2": [13276.5, 6445.5]}] Is there ...

Steps to effectively pass parameters in a function object literal

As a JavaScript beginner utilizing an object literal pattern, I am attempting to pass integers as min and max parameters to a function in order to retrieve a random number for use in another function called "interaction". However, I encountered the error m ...

PHP function for converting a string line to data

In my possession is a JSON data file retrieved from the cloud that appears as follows: { "timestamp":1526005337995, "data":[ { "_id":"ByWpiEKaM", "data":"N12E00008", "raw":[78,49,50,69,48,48,48,48,56], ...

Getting data from Twilio Autopilot using PHP is not as complicated as it may seem

Hey everyone! I've encountered an issue with my PHP code that needs to receive some JSON (x-www-form-urlencoded) data from a Twilio Autopilot redirect. This is the code I'm currently using: $data = file_get_contents('php://input'); H ...

The console correctly detects the value, but is unable to set the innerHTML property of null

I am currently working on a webpage that allows users to sign in and create an account. The issue I'm facing is that when I try to display the user's information, I encounter the error 'Cannot set property 'innerHTML' of null.&apos ...

Ways to include x-api-key in Angular API request headers

I am attempting to include the x-api-key header in the headers, as shown below: service.ts import { Injectable } from '@angular/core'; import { Http, Headers, RequestOptions, Response } from '@angular/http'; import { Observable } from ...

Utilizing logic classes in conjunction with styled components

I am seeking a way to utilize this logic in order to assign the appropriate class to an element: <ul onClick={handleClick} className={click ? 'dropdown-menu clicked' : 'dropdown-menu'}> However, as I am employing styled component ...

Is it possible to include all visible content, even when scrolling, within the full page height?

My webpage contains content that exceeds the height of the window. I am looking for a way to retrieve the full height of my page using either jQuery or pure Javascript. Can anyone provide a solution? I have considered the following approach: $('body ...

Creating a component in Vue to showcase Axios, based on a straightforward example from the documentation

I apologize in advance for what may seem like a trivial question, but I assure you that I have put in a considerable amount of effort to solve this problem without success. In my appService.js file, I am making an API call as follows: import axios from &a ...