Download the PHP package aboks/power-iteration without Composer

On this page you can find all versions of the php package aboks/power-iteration. It is possible to download/install these versions without Composer. Possible dependencies are resolved automatically.

FAQ

After the download, you have to make one include require_once('vendor/autoload.php');. After that you have to import the classes with use statements.

Example:
If you use only one package a project is not needed. But if you use more then one package, without a project it is not possible to import the classes with use statements.

In general, it is recommended to use always a project to download your libraries. In an application normally there is more than one library needed.
Some PHP packages are not free to download and because of that hosted in private repositories. In this case some credentials are needed to access such packages. Please use the auth.json textarea to insert credentials, if a package is coming from a private repository. You can look here for more information.

  • Some hosting areas are not accessible by a terminal or SSH. Then it is not possible to use Composer.
  • To use Composer is sometimes complicated. Especially for beginners.
  • Composer needs much resources. Sometimes they are not available on a simple webspace.
  • If you are using private repositories you don't need to share your credentials. You can set up everything on our site and then you provide a simple download link to your team member.
  • Simplify your Composer build process. Use our own command line tool to download the vendor folder as binary. This makes your build process faster and you don't need to expose your credentials for private repositories.
Please rate this library. Is it a good library?

Example code of aboks/power-iteration

Informations about the package power-iteration

Continuous Integration Latest Stable Version

PowerIteration

Implementation of the Power Iteration method for finding (dominant) eigenvalues and the corresponding eigenvectors of a matrix, using the excellent math-php library.

Installation

Install using composer:

Basic usage

Advanced usage

Calculating the least dominant eigenpair

In most situations, one is interested in the dominant eigenvalue and its corresponding eigenvector. It is also possible to calculate the least dominant eigenpair however:

Customizations

Stopping criterion

By default, the power iteration runs for 1000 iterations. The stopping criterion can be altered by passing an instance of StoppingCriterion as the first argument to PowerIteration:

Scaling method

To prevent overflow in case of very large eigenvalues (or underflow in case of small eigenvalues), the eigenvector estimates are scaled/normalized after each iteration. The final eigenvector estimate is also scaled using the same method. By default, the estimates are scaled to a unit vector based on the L2-norm. To use a different method, provide an instance of ScalingMethod as a second argument to PowerIteration:

Running tests

After installing dependencies (including development dependencies) using Composer, run

from the project root dir.

Contributing

Contributions to this library are very welcome! Please make sure that your changes have sufficient test coverage, and that the code follows PSR-2.

Versioning

This project adheres to Semantic Versioning.

License

The code is released under the MIT license.

All versions of power-iteration with dependencies

PHP Build Version
Package Version
Requires php Version ^7.3 || ^8.0
markrogoyski/math-php Version ^0.38.0 || ^1.0 || ^2.0
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

The package aboks/power-iteration contains the following files

Loading the files please wait ....