https://github.com/flutter-studio/rk4

The fourth order runge kutta method is used to solve the first and second order differential equations
https://github.com/flutter-studio/rk4

kutta rk rk4 runge rungekutta

Last synced: about 1 month ago
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The fourth order runge kutta method is used to solve the first and second order differential equations

• Host: GitHub
• URL: https://github.com/flutter-studio/rk4
• Owner: flutter-studio
• License: other
• Created: 2019-12-03T09:47:54.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-12-04T12:37:37.000Z (over 6 years ago)
• Last Synced: 2025-08-03T21:41:22.652Z (10 months ago)
• Topics: kutta, rk, rk4, runge, rungekutta
• Language: Dart
• Size: 7.81 KB
• Stars: 2
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
English | [简体中文](./README_zh-CN.md)

# rk4

[![pub package](https://img.shields.io/pub/v/rk4.svg)](https://pub.dartlang.org/packages/rk4)

The fourth order runge kutta method is used to solve the first and second order differential equations

## Usage

To use this plugin, add `rk4` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).

## Example

``` dart

// Import package

import 'package:rk4/rk4.dart';

import 'package:flutter/material.dart';

 RK4(

    xInit: 0,

    yInit: 0,

    criticalValue: 1,

    k1: (x, y) => 1 - y,

  ).run().forEach((rr) {

    print("------ x: ${rr.x} y: ${rr.y}");

  });

  RK4

      .second(

        xInit: 0,

        yInit: -0.4,

        yDInit: -0.6,

        l1: (x, y, yd) => pow(e, 2 * x) * sin(x) - 2 * y + 2 * yd,

        criticalValue: 1,

      )

      .run()

      .forEach((rr) {

    print("------ x: ${rr.x} y: ${rr.y}");

  });

```