Peter Stahlecker

Pymonad

14

I installed _pymonad_ on Carnet plus like _%pip install pymonad._ This seemed to work, no error messages Then I tried: _from pymonad import curry_ (Which should exist according to the...

Installing SDEINT

26

sdeint is a pure Python package to integrate stochastic differential equations. When I try to install it I get a message like it is installed, but it is not. I...

Long calculations on iPad

31

This Carnet Plus is really GREAT!! One point: iPads tend to 'turn off' if they have not been touched (or looked at, with the new ones) for a certain time....

Kinetic energy

6

I tried to model an ellipse rolling on a horizontal line. Absent any friction, a necessary (by no means sufficient) conditions that the equations of motion are right is that...

Dear Roger, I just installed your _filterpy_, and scanned through your book Kalman and Bayesian Filters in Python. VERY understandable for me! I use _sympy.physics.mechanics_ to generate equations of motion,...

IOS 15

6

Apple just released iOS16. Will carnets plus run under iOS 16? I cannot upgrade to test it, because if it does not work, I cannot downgrade to iOS15.6 anymore. Thanks!

sympy sm.Heaviside

11

In the force term of some multi body system I am playing around with, there are terms containing sm.Heaviside(q, u) (generalized coordinates / speeds) Now I form the term: jakob...

I have been playing around with a simple n+1 particle pendulum. The first particle may only move in X direction. The particles are connected by (unbendable) springs and dampers. Using...

Add Peter's first examples.

36

3D n body pendulum, where the bodies can rotate around the massless rods connecting one body to the next one. If they hit each other, they are ideally elastic and...

A question: Mechanical system with white noise external forces

2

I have a mechanical system described as d/dt (q) = f(q, t, F), where q …generalized coordinates, F…external forces to be modeled as white noise (Where I used sympy.physics.mechanics to...