Controlling Concurrency
Controlling Concurrency ojAlgo is multithreaded – some operations are automatically divided to run in multiple threads. You don't have to do anything for this to happen. ojAlgo senses what hardware…
Any post containing code examples
Generalised Eigenvalue Problems
Generalised Eigenvalue Problems ojAlgo now has built-in direct support for (some) generalised eigenvalue problems where both A and B are symmetric/hermitian and B is positive definite. Each of these problems can be reduced to a standard…
The Diet Problem
The diet problem is one of the earliest real-life problems to be solved using linear programming. This example shows how to use ojAlgo to model and solve a (miniature) instance…
The McNuggets Challenge
This is not an eating competition, instead you have to think. The Challenge Chicken McNuggets can be ordered in the sizes of 6, 9 and 20 pieces. Being allowed to…
ojAlgo v47.1.1, ojAlgo-finance v2.1 & Financial Time Series Data
ojAlgo v47.1.1 Primarily this release has improvements to the optimisation code:Extensive work on tuning the solvers (primarily the ConvexSolver) Major refactoring of test cases (mainly for LinearSolver and IntegerSolver).The presolve…
StatQuest PCA Example
StatQuest (Josh Starmer) has published a great video explaining principal component analysis (PCA). In the video he mentions that he is using Singular Value Decomposition (SVD), but he doesn't actually…
Linear Algebra Introduction
The linear algebra part of ojAlgo is one of its main attractions as well as an essential component to the other parts. It’s not difficult to use at all, but…
Neural Network Basics
A previous post introduced ojAlgo's Artificial Neural Network feature. It did so by presenting a fully functional program that trained and evaluated a network model to categorise handwritten digits using the MNIST data set.…
Introducing Artificial Neural Networks with ojAlgo
With v46 ojAlgo got support for building artificial neural networks. Here's an example of what you can do with it. The MNIST database is a large image database of handwritten digits…