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A simple runge-kutta 4 integrator

Project Description

A simple implementation of Runge-Kutta for python.

Setup

Install

pip install pyrk

Develop

git clone https://github.com/walchko/pyrk
cd pyrk
pip install -e .

Usage

See the examples in the docs folder or a simple one:

from __future__ import division, print_function
from pyrk import RK4
import numpy as np
import matplotlib.pyplot as plt

def vanderpol(t, xi, u):
        dx, x = xi
        mu = 4.0 # damping

        ddx = mu*(1-x**2)*dx-x
        dx = dx

        return np.array([ddx, dx])

rk = RK4(vanderpol)
t, y = rk.solve(np.array([0, 1]), .01, 200)

y1 = []
y2 = []
for v in y:
        y1.append(v[0])
        y2.append(v[1])

plt.plot(y1, y2)
plt.ylabel('velocity')
plt.xlabel('position')
plt.grid(True)
plt.show()
Release History

Release History

This version
History Node

0.9.0

History Node

0.6.1

History Node

0.6.0

History Node

0.5.4

History Node

0.5.3

History Node

0.5.2

History Node

0.5.1

Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
pyrk-0.9.0-py2-none-any.whl (4.3 kB) Copy SHA256 Checksum SHA256 py2 Wheel Apr 11, 2017
pyrk-0.9.0-py3-none-any.whl (4.3 kB) Copy SHA256 Checksum SHA256 py3 Wheel Apr 11, 2017
pyrk-0.9.0.tar.gz (2.7 kB) Copy SHA256 Checksum SHA256 Source Apr 11, 2017

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