NodeJS frontend-less plotting lib using plotly.js

NodePlotLib

Library to create top-notch plots directly within NodeJS on top of plotly.js without any front-end preparations. Inspired by matplotlib.

Installation

npm install nodeplotlib
# or
yarn add nodeplotlib

Usage

Overview

Use with TypeScript/JavaScript:

import { plot, Plot } from 'nodeplotlib';
const data: Plot[] = [{x: [1, 3, 4, 5], y: [3, 12, 1, 4], type: 'line'}];
plot(data);

If ES5 use require() instead of import. Here is a short animation about howto and the results.

Detailed usage

Since Python provides with matplotlib a library for spawning plot windows, NodeJS isn’t by default. But there are awesome plotting libraries for usage in front-end. So this lib targets people like scientists who easily want to create beautiful plots in a time-saving way.

The library provides a simple interface with (for now) just three functions. A plot, stack and a clear function. The plot() functions spawns a plot to the browser, if a plotdata is given as an argument. Otherwise it plots all the stack()ed plotdata. The arguments are of type Plot, which is a partial of plotly’s PlotData type. With the clear() function the stack container can be cleared.

With the stack function the user is able to print multiple charts on one page.

import { plot, stack, clear, Plot } from 'nodeplotlib';

const data: Plot[] = [{
  x: [ 1, 3, 4, 6, 7],
  y: [ 2, 4, 6, 8, 9],
  type: 'scatter'
}];

stack(data);
stack(data);
stack(data);
plot();

The plot function plots all stacked plots and the plot given by parameter (if there is one). Afterwards the temporary container gets cleared and you can call stack() and plot() again without any predefined plots.

The functions are of the form:

import { plot, stack, clear, Plot, Layout } from 'nodeplotlib';

plot(data?: Plot[], layout?: Layout): void;
stack(data: Plot[], layout?: Layout): void;
clear(): void;

Quick start

In this section there are some examples to getting started. See the full plotly cheatsheet.

Line Plots

const trace1: Plot = {x: [1, 2], y: [1, 2], type: 'scatter'};
const trace2: Plot = {x: [3, 4], y: [9, 16], type: 'scatter'};
plot([trace1, trace2]);

Bar Charts

const trace: Plot = {x: [1, 2], y: [1, 2], type: 'bar'};
plot([trace]);

3D Line Plots

const trace: Plot = {x: [9, 8, 5, 1], y: [1, 2, 4, 8], z: [11, 8, 15, 3], type: 'scatter3d'};
plot([trace]);

3D Surface Plots

const trace: Plot = {colorscale: 'Viridis', z: [[3, 5, 7, 9], [21, 13, 8, 5]]};
plot([trace]);

Radial Plots

In order to style the plot, one is able to pass in the layout parameter, which internally is typeof Partial<Layout> from plotly’s Layout. See the full layout documentation here.

With this parameter one is able to define styles like title, axis labels, subplots and many more.

const data: Plot[] = [{
  type: 'scatterpolar',
  r: [1.5, 10, 39, 31, 15, 1.5],
  theta: ['A','B','C', 'D', 'E', 'A'],
  fill: 'toself',
  name: 'Group B'
}];

const layout: Layout = [
  polar: {
    radialaxis: {
      visible: true,
      range: [0, 50]
    }
  }
];

plot(data, layout);

Plot types

Simple charts	Advanced charts	3D Plots
Scatter	2d density plots	Scatter
Line	Histograms	Surface
Bar	Box-plots	Lines
Pie charts	Contour plots
Sankey diagrams	Heatmaps
Tables	Radar charts

Behind the scenes

The lib launches a webserver and opens new tabs for every plot located at http://localhost:8080/plots/:id. At this address a temporary html template file, the nodeplotlib script and plotly.min.js are available. The client side js requests the plot data at http://localhost:8080/data/:id. After all pending plots are opened in a unique tab and all the data is requested, the server shuts down. If you fire another plot the server starts again provides your plot and shuts down automatically.

Another port can be provided via PORT environment variable.

Contributing

Contributions in all forms are welcome.

Developers guide

Fork the Github repository and clone it to your PC. Install the npm dependencies using the install command. It installs the dependencies and copies plotly types to project source. These won’t affect the git tree.

Roadmap

It would be nice to make the library compatible with Observable-streams and update the plots in real-time.

Download Details:

Author: ngfelixl

GitHub: https://github.com/ngfelixl/nodeplotlib

#nodejs #javascript #node-js #node

What is GEEK

Buddha Community

NodeJS frontend-less plotting lib using plotly.js

NodePlotLib

Library to create top-notch plots directly within NodeJS on top of plotly.js without any front-end preparations. Inspired by matplotlib.

Installation

npm install nodeplotlib
# or
yarn add nodeplotlib

Usage

Overview

Use with TypeScript/JavaScript:

import { plot, Plot } from 'nodeplotlib';
const data: Plot[] = [{x: [1, 3, 4, 5], y: [3, 12, 1, 4], type: 'line'}];
plot(data);

If ES5 use require() instead of import. Here is a short animation about howto and the results.

Detailed usage

Since Python provides with matplotlib a library for spawning plot windows, NodeJS isn’t by default. But there are awesome plotting libraries for usage in front-end. So this lib targets people like scientists who easily want to create beautiful plots in a time-saving way.

The library provides a simple interface with (for now) just three functions. A plot, stack and a clear function. The plot() functions spawns a plot to the browser, if a plotdata is given as an argument. Otherwise it plots all the stack()ed plotdata. The arguments are of type Plot, which is a partial of plotly’s PlotData type. With the clear() function the stack container can be cleared.

With the stack function the user is able to print multiple charts on one page.

import { plot, stack, clear, Plot } from 'nodeplotlib';

const data: Plot[] = [{
  x: [ 1, 3, 4, 6, 7],
  y: [ 2, 4, 6, 8, 9],
  type: 'scatter'
}];

stack(data);
stack(data);
stack(data);
plot();

The plot function plots all stacked plots and the plot given by parameter (if there is one). Afterwards the temporary container gets cleared and you can call stack() and plot() again without any predefined plots.

The functions are of the form:

import { plot, stack, clear, Plot, Layout } from 'nodeplotlib';

plot(data?: Plot[], layout?: Layout): void;
stack(data: Plot[], layout?: Layout): void;
clear(): void;

Quick start

In this section there are some examples to getting started. See the full plotly cheatsheet.

Line Plots

const trace1: Plot = {x: [1, 2], y: [1, 2], type: 'scatter'};
const trace2: Plot = {x: [3, 4], y: [9, 16], type: 'scatter'};
plot([trace1, trace2]);

Bar Charts

const trace: Plot = {x: [1, 2], y: [1, 2], type: 'bar'};
plot([trace]);

3D Line Plots

const trace: Plot = {x: [9, 8, 5, 1], y: [1, 2, 4, 8], z: [11, 8, 15, 3], type: 'scatter3d'};
plot([trace]);

3D Surface Plots

const trace: Plot = {colorscale: 'Viridis', z: [[3, 5, 7, 9], [21, 13, 8, 5]]};
plot([trace]);

Radial Plots

In order to style the plot, one is able to pass in the layout parameter, which internally is typeof Partial<Layout> from plotly’s Layout. See the full layout documentation here.

With this parameter one is able to define styles like title, axis labels, subplots and many more.

const data: Plot[] = [{
  type: 'scatterpolar',
  r: [1.5, 10, 39, 31, 15, 1.5],
  theta: ['A','B','C', 'D', 'E', 'A'],
  fill: 'toself',
  name: 'Group B'
}];

const layout: Layout = [
  polar: {
    radialaxis: {
      visible: true,
      range: [0, 50]
    }
  }
];

plot(data, layout);

Plot types

Simple charts	Advanced charts	3D Plots
Scatter	2d density plots	Scatter
Line	Histograms	Surface
Bar	Box-plots	Lines
Pie charts	Contour plots
Sankey diagrams	Heatmaps
Tables	Radar charts

Behind the scenes

The lib launches a webserver and opens new tabs for every plot located at http://localhost:8080/plots/:id. At this address a temporary html template file, the nodeplotlib script and plotly.min.js are available. The client side js requests the plot data at http://localhost:8080/data/:id. After all pending plots are opened in a unique tab and all the data is requested, the server shuts down. If you fire another plot the server starts again provides your plot and shuts down automatically.

Another port can be provided via PORT environment variable.

Contributing

Contributions in all forms are welcome.

Developers guide

Fork the Github repository and clone it to your PC. Install the npm dependencies using the install command. It installs the dependencies and copies plotly types to project source. These won’t affect the git tree.

Roadmap

It would be nice to make the library compatible with Observable-streams and update the plots in real-time.

Download Details:

Author: ngfelixl

GitHub: https://github.com/ngfelixl/nodeplotlib

#nodejs #javascript #node-js #node

How to Hire Node.js Developers And How Much Does It Cost?

Are you looking for Node.js developers for your project?

There are many factors to consider before hiring Node.js developers for your project. This blog elaborates on Node.js framework’s uses, hiring Node.js developers, and how much it costs to hire them.
What is Node JS?
Node.js is an open-source, server-side scripting framework with a JavaScript run time environment. The framework functions as a connecting bridge between the front end and back-end of the application. It is used to build the fastest server-side applications with cross-platform capabilities. With Node.js, you can easily automate the repetitive tasks, effectively use libraries, and integrate the reusable components.

Node.js framework is used to create dynamic web pages, I/O intensive, CRM development, and build scalable applications.

#node.js #advantages of nodejs #cost of nodejs development #hire node.js developers #hire nodejs developer #node js development #what is node.js

Hire Frontend Developers

Create a new web app or revamp your existing website?

Every existing website or a web application that we see with an interactive and user-friendly interface are from Front-End developers who ensure that all visual effects come into existence. Hence, to build a visually appealing web app front-end development is required.

At HourlyDeveloper.io, you can Hire FrontEnd Developers as we have been actively working on new frontend development as well as frontend re-engineering projects from older technologies to newer.

Consult with experts: https://bit.ly/2YLhmFZ

#hire frontend developers #frontend developers #frontend development company #frontend development services #frontend development #frontend

Hire NodeJs Developer

Looking to build dynamic, extensively featured, and full-fledged web applications?

Hire NodeJs Developer to create a real-time, faster, and scalable application to accelerate your business. At HourlyDeveloper.io, we have a team of expert Node.JS developers, who have experience in working with Bootstrap, HTML5, & CSS, and also hold the knowledge of the most advanced frameworks and platforms.

Contact our experts: https://bit.ly/3hUdppS

#hire nodejs developer #nodejs developer #nodejs development company #nodejs development services #nodejs development #nodejs

Why use Node.js for Web Development? Benefits and Examples of Apps

Front-end web development has been overwhelmed by JavaScript highlights for quite a long time. Google, Facebook, Wikipedia, and most of all online pages use JS for customer side activities. As of late, it additionally made a shift to cross-platform mobile development as a main technology in React Native, Nativescript, Apache Cordova, and other crossover devices. 

Throughout the most recent couple of years, Node.js moved to backend development as well. Designers need to utilize a similar tech stack for the whole web project without learning another language for server-side development. Node.js is a device that adjusts JS usefulness and syntax to the backend. 

What is Node.js? 

Node.js isn’t a language, or library, or system. It’s a runtime situation: commonly JavaScript needs a program to work, however Node.js makes appropriate settings for JS to run outside of the program. It’s based on a JavaScript V8 motor that can run in Chrome, different programs, or independently. 

The extent of V8 is to change JS program situated code into machine code — so JS turns into a broadly useful language and can be perceived by servers. This is one of the advantages of utilizing Node.js in web application development: it expands the usefulness of JavaScript, permitting designers to coordinate the language with APIs, different languages, and outside libraries.

What Are the Advantages of Node.js Web Application Development? 

Of late, organizations have been effectively changing from their backend tech stacks to Node.js. LinkedIn picked Node.js over Ruby on Rails since it took care of expanding responsibility better and decreased the quantity of servers by multiple times. PayPal and Netflix did something comparative, just they had a goal to change their design to microservices. We should investigate the motivations to pick Node.JS for web application development and when we are planning to hire node js developers. 

Amazing Tech Stack for Web Development 

The principal thing that makes Node.js a go-to environment for web development is its JavaScript legacy. It’s the most well known language right now with a great many free devices and a functioning local area. Node.js, because of its association with JS, immediately rose in ubiquity — presently it has in excess of 368 million downloads and a great many free tools in the bundle module. 

Alongside prevalence, Node.js additionally acquired the fundamental JS benefits: 

• quick execution and information preparing; 
• exceptionally reusable code; 
• the code is not difficult to learn, compose, read, and keep up; 
• tremendous asset library, a huge number of free aides, and a functioning local area. 

In addition, it’s a piece of a well known MEAN tech stack (the blend of MongoDB, Express.js, Angular, and Node.js — four tools that handle all vital parts of web application development). 

Designers Can Utilize JavaScript for the Whole Undertaking 

This is perhaps the most clear advantage of Node.js web application development. JavaScript is an unquestionable requirement for web development. Regardless of whether you construct a multi-page or single-page application, you need to know JS well. On the off chance that you are now OK with JavaScript, learning Node.js won’t be an issue. Grammar, fundamental usefulness, primary standards — every one of these things are comparable. 

In the event that you have JS designers in your group, it will be simpler for them to learn JS-based Node than a totally new dialect. What’s more, the front-end and back-end codebase will be basically the same, simple to peruse, and keep up — in light of the fact that they are both JS-based. 

A Quick Environment for Microservice Development 

There’s another motivation behind why Node.js got famous so rapidly. The environment suits well the idea of microservice development (spilling stone monument usefulness into handfuls or many more modest administrations). 

Microservices need to speak with one another rapidly — and Node.js is probably the quickest device in information handling. Among the fundamental Node.js benefits for programming development are its non-obstructing algorithms.

Node.js measures a few demands all at once without trusting that the first will be concluded. Many microservices can send messages to one another, and they will be gotten and addressed all the while. 

Versatile Web Application Development 

Node.js was worked in view of adaptability — its name really says it. The environment permits numerous hubs to run all the while and speak with one another. Here’s the reason Node.js adaptability is better than other web backend development arrangements. 

Node.js has a module that is liable for load adjusting for each running CPU center. This is one of numerous Node.js module benefits: you can run various hubs all at once, and the environment will naturally adjust the responsibility. 

Node.js permits even apportioning: you can part your application into various situations. You show various forms of the application to different clients, in light of their age, interests, area, language, and so on. This builds personalization and diminishes responsibility. Hub accomplishes this with kid measures — tasks that rapidly speak with one another and share a similar root. 

What’s more, Node’s non-hindering solicitation handling framework adds to fast, letting applications measure a great many solicitations. 

Control Stream Highlights

Numerous designers consider nonconcurrent to be one of the two impediments and benefits of Node.js web application development. In Node, at whatever point the capacity is executed, the code consequently sends a callback. As the quantity of capacities develops, so does the number of callbacks — and you end up in a circumstance known as the callback damnation. 

In any case, Node.js offers an exit plan. You can utilize systems that will plan capacities and sort through callbacks. Systems will associate comparable capacities consequently — so you can track down an essential component via search or in an envelope. At that point, there’s no compelling reason to look through callbacks.

 

Final Words

So, these are some of the top benefits of Nodejs in web application development. This is how Nodejs is contributing a lot to the field of web application development. 

I hope now you are totally aware of the whole process of how Nodejs is really important for your web project. If you are looking to hire a node js development company in India then I would suggest that you take a little consultancy too whenever you call. 

Good Luck!

Original Source

#node.js development company in india #node js development company #hire node js developers #hire node.js developers in india #node.js development services #node.js development