Knime – Multivariate time series

Intro: Knime is a  very powerful machine learning tool, particularly suitable for the management of complicated workflows as well as rapid prototyping. It has recently become yet more useful with the arrival of easy-to-use Python nodes. This is true because sometimes the set of nodes – which is large – …

Multivariate Time Series Forecasting with Neural Networks (3) – multivariate signal noise mixtures

In this follow up post we apply the same methods we developed previously to a different dataset. In this third post we mix the previous two datasets. So, on the one hand, we have noise signals, on the other hand we have innovators and followers.

Multivariate Time Series Forecasting with Neural Networks (1)

In this post we present the results of a competition between various forecasting techniques applied to multivariate time series. The forecasting techniques we use are some neural networks, and also – as a benchmark – arima. In particular the neural networks we considered are long short term memory (lstm) networks, and dense …

Game of Nim, Supervised Learning

There are entire theses devoted to reinforcement learning of the game of nim, in particular those of ERIK JÄRLEBERG (2011) and  PAUL GRAHAM & WILLIAM LORD (2015). Those two were successful in training a reinforcement-based agent to play the game of nim with a high percentage of accurate moves. However, they used lookup tables …

Game of Nim

This post starts a mini series of two posts in which we want to solve the Game of Nim using Reinforcement learning. The first part of this mini series is devoted to having a look at using our own Nim-specific custom environment for OpenAI. The Game of Nim is a …

Windy Walk (part 2)

Recap: Previously we constructed a very simple class to emulate the type of environment which is provided by OpenAI. Then we simulated two windy walks and used the result of these walks to produce some plots. Now we want to produce the same results again but via a different and …

Windy Walk

So, today we advance to something slightly more interesting. OpenAI, founded by Elon Musk and Sam Altman, is a cool platform for testing artificial intelligence algorithms. The platform aims to provide a consistent interface for a host of different environments. It is also extensible. The most import thing in this mini-series …