OpenSourc.ES


Graph Coloring using Cliques

Using maximal cliques to find graph colorings faster.

29 November 2020 in julia + constraint-programming + graph-theory


Javis v0.3: How to animate a Fourier series

The biggest changes in Javis v0.3 and how it makes animations easier. Making Fourier animations in a few minutes.

12 November 2020 in julia + javis + animation + fourier


Debugging in Julia - Two different ways

Different ways of debug julia code without using println.

30 October 2020 in julia + debugging + basics


The Julia Package Manager

How to use the package manager in Julia and create your own environment or package.

16 October 2020 in julia + pkg-development + basics


Javis v0.2 and the Future

What's new in Javis v0.2 and what have we planned for the future?

29 September 2020 in julia + javis + visualization + animation


Javis.jl with Animations.jl

How to make powerful animations in JuliaLang with Javis.jl and Animations.jl?

09 September 2020 in julia + javis + visualization + animation


Housekeeping August 2020

What happened in August? First version of Javis.jl. Project management, master thesis and the future.

28 August 2020 in julia + blog


ConstraintSolver.jl Refactoring

Refactoring of ConstraintSolver.jl and what I've learned about properties and hashes.

12 August 2020 in julia + constraint-programming


The beginning of Javis.jl

A small introduction to the new project Javis.jl. What do you want to animate?

04 August 2020 in julia + javis + visualization + animation


Visualizing Pi, Tau and prime numbers

Visualizing Pi, Tau as well as prime numbers using Luxor.jl

13 July 2020 in julia + luxor


ConstraintSolver.jl Reified constraint

How to extend JuMP to support a new constraint type? The reified constraint.

13 July 2020 in julia + constraint-programming + jump


Pi vs Tau

Is Pi better or Tau? I'm always for pie. Mathematical reasons are boring. Your visual cortex should decide.

12 July 2020 in julia + luxor


Side gig: Mentoring Julia newcomers

Why I think code reviews/mentoring are helpful for beginners. What do I have to offer?

07 July 2020 in julia + code-reviews + mentoring


Julia Basics: REPL & Revise

What do I need to start with Julia? Learning the REPL and Revise.

01 July 2020 in julia + basics


Julia Basics: Multiple Dispatch

Series of Julia basics: What is multiple dispatch? Explanation on how to use it and why it is powerful.

22 June 2020 in basics + julia


ConstraintSolver.jl Indicator Part 2

Extending JuMP.jl in your own package to support more constraints.

17 June 2020 in constraint-programming + julia


Franklin.jl

Using Franklin for the new blog layout. A static site generator written for Julians.

09 June 2020 in julia + blog


Indicator constraint + Benchmarks

Part 23: Adding an indicator constraint to the ConstraintSolver

06 June 2020 in constraint-programming + julia


Housekeeping May 2020

Housekeeping: Logo for the constraint solver, Exercism, Streaming and a new blog layout which hopefully comes soonish.

05 June 2020 in blog + julia


Bugs and Benchmarks

How to build a constraint programming solver in Julia. Part 22: Bugs, debugging and benchmarking without loosing sanity

11 May 2020 in constraint-programming + julia


Solving Str8ts

How to build a constraint programming solver in Julia. Part 21: How to solve Str8ts using constraint programming?

27 April 2020 in constraint-programming + julia


Table constraint

How to build a constraint programming solver in Julia. Part 20: Implementing the table constraint.

26 April 2020 in constraint-programming + julia


ConstraintSolver.jl v0.1.0

How to build a constraint programming solver in Julia. Part 19: Release of v0.1.0

06 April 2020 in julia + constraint-programming + optimization


Bound computation

How to build a constraint programming solver in Julia. Part 8: Computing bounds

09 March 2020 in julia


COVID-19 Visualization

How to create a visualization on a map using Julia and Luxor.jl?

06 March 2020 in


YouTube videos, Mandelbrot & Enigma, ...

What happened the last couple of days? Started making YouTube videos and some other changes...

28 February 2020 in


Table logging in Julia

Log something in a table by adding rows to the command line. Useful for things like solvers to show best bounds, incumbents and some other information

19 February 2020 in julia + constraint-programming


Building an Enigma emulator and a Bombe

How does the Enigma work and how to code one? As well as getting the flaws and crack the code!

09 February 2020 in julia + cryptography + enigma


Kaggle Santa 2019: Final take

My final take on the Kaggle Santa 2019 challenge and finally getting the optimum (late)

27 January 2020 in kaggle + julia


Constraint Solver: Support for linear objectives

Possibility to use linear objectives in ConstraintSolver.jl.

21 January 2020 in julia + optimization + constraint-programming


Constraint Solver: Dealing with real coefficients!

How to deal with real coefficients in the sum constraint?

19 January 2020 in julia + optimization + constraint-programming


Constraint Solver: How to use JuMP for your own solver?

How to add JuMP as the modelling layer?

10 January 2020 in julia + optimization + constraint-programming


Improving on the current Santa Kaggle Challenge: MIP and swapping

Optimizing on a solution and trying out some linear programming

10 December 2019 in julia + optimization + kaggle


First approach for the Kaggle Santa 2019 challenge

How to get a good starting solution for the 2019 Kaggle Santa Workshop problem? Using the hungarian method and some improvement strategy

29 November 2019 in julia + optimization + kaggle


Finding the maximum cardinality matching in a bipartite graph

How to build a constraint programming solver in Julia using graph theory? Basics: Bipartite maximum cardinality matching

15 November 2019 in julia + constraint-programming + graph-theory


How to profile julia code?

How to build a constraint programming solver in Julia? Profiling your julia code. Memory reduction

09 November 2019 in julia + constraint-programming + optimization + profiling


Constraint Solver Part 12: Documentation and small changes

How to build a constraint programming solver in Julia? How to use Documenter.jl with github actions, benchmarks and small changes

25 October 2019 in julia + constraint-programming + optimization


Constraint Solver Part 11: Graph Coloring Part 2

How to build a constraint programming solver in Julia? Graph coloring using MIP and our constraint solver.

18 October 2019 in julia + constraint-programming + optimization


Constraint Solver Part 10: Graph Coloring Part 1

How to build a constraint programming solver in Julia? First part of graph coloring.

10 October 2019 in julia + constraint-programming + optimization + video


Constraint Solver Part 9: Recap video

How to build a constraint programming solver in Julia. Video explanation of the current state.

08 October 2019 in julia + constraint-programming + optimization + video


Constraint Solver Part 8: UI Refactoring

How to build a constraint programming solver in Julia. Part 8: Better user interface and refactoring of internal design for future constraints

04 October 2019 in julia + constraint-programming + optimization


Constraint Solver Part 7: Sum constraint speed-up

How to build a constraint programming solver in Julia. Part 7: Speed up of the sum constraint.

27 September 2019 in julia + puzzle + constraint-programming + optimization


Constraint Solver Part 6: Backtrack and Sum constraint

How to build a constraint programming solver in Julia. Part 6: Backtracking without recursion and sum constraint.

21 September 2019 in julia + puzzle + constraint-programming + optimization


Constraint Solver Part 5: Different data structure

How to build a constraint programming solver in Julia. Part 5: Use a better data structure

16 September 2019 in julia + puzzle + constraint-programming + optimization


Constraint Solver Part 4: Alldifferent constraint

How to build a constraint programming solver in Julia. Part 4: Alldifferent constraint and powerful Sudoku solver + Benchmarking.

12 September 2019 in julia + puzzle + constraint-programming + optimization + graph-theory


Constraint Solver Part 3: More Pruning and Benchmarking

How to build a constraint programming solver in Julia. Part 3: Pruning + Benchmarking.

09 September 2019 in julia + puzzle + constraint-programming + optimization


Constraint Solver Part 2: Pruning

How to build a constraint programming solver in Julia. Part 2: Pruning.

07 September 2019 in julia + puzzle + constraint-programming + optimization


Setup and backtracking

How to build a constraint programming solver in Julia. Part 1: Solving Sudoku using backtracking

05 September 2019 in constraint-programming


B-splines

Explanation of B-splines and their comparison to Bézier splines as well as animations using Julia

24 August 2019 in julia + visualization


Neuromorphic computing: Hardware

State of neuromorphic hardware and different approaches

05 August 2019 in neuromorphic + neuroscience


Neuralink: What's new?

What is the company Neuralink doing? What did they present on Tuesday 16.07.2019?

17 July 2019 in neuroscience


Neuromorphic computing: An Overview

What is neuromorphic computing and what is the state of it?

18 June 2019 in neuromorphic + neuroscience


Bézier curves in Julia with animations

Bézier curve basics and animations

10 May 2019 in julia + visualization


Random Forest Regression from scratch used on Kaggle competition

Random forest regression package in Julia and competing in a Kaggle challenge

01 May 2019 in julia + machine learning


Speeding up my julia code for the hungarian method

Speeding up julia code. Different tricks and measurements shown on a real project.

03 April 2019 in julia + optimization + performance


Hang your code on the wall

You've spend such a long time on your project and are proud? Hang it on your office wall or as art in your living room.

27 March 2019 in julia + visualization + art


Multiplicative persistence with Julia

Multiplicative persistence the secret of 277777788888899

21 March 2019 in julia + visualization + performance


CSV2HTML data filtering, sorting

How I visualize my csv files using DataTables

08 March 2019 in javascript + visualization


Juniper workflow

Project workflow for Juniper hopefully interesting for your own projects

06 March 2019 in julia + javascript


Kaggle: Prime Travelling Santa 2018 - MIP

Using MIP for solving local versions of the Kaggle Santa 2018 problem using Julia.

17 January 2019 in kaggle + julia + optimization + mip


Google Colab vs own GTX 1060

Using a free Tesla K80 GPU on Google Colab vs an own GTX 1060 6GB

12 October 2018 in ai + neural nets + machine learning


Free GPU with Google Colab

Using a free Tesla K80 GPU with Google Colab

04 October 2018 in ai + python + neural nets + machine learning


Handwritten equations to LaTeX

Using CNN and Seq2Seq Learning to generate LaTeX code from handwritten equations

18 August 2018 in ai + python + neural nets + machine learning + tensorflow


AlphaZero for Nash

Using AlphaZero General for the game Nash/Hex

25 March 2018 in ai + python + neural nets + machine learning + tensorflow


Hungarian Method

Implementation of the hungarian method in Julia for finding the optimal match in a Kaggle problem

06 February 2018 in julia + optimization


MINLP - Travelling Salesman with Neighborhoods

Solving the travelling salesman problem with neighborhoods using Mixed Integer Non Linear programming with Julia and Juniper.jl

17 December 2017 in julia + minlp + nonlinear + optimization


MIP - Travelling Salesman

Solving the travelling salesman problem (TSP) with Mixed Integer programming (MIP) in Julia using JuMP.

15 October 2017 in julia + mip + constraint-programming + linear-programming + optimization


Simplex: Add constraints

Explanation and programming of adding constraints to a linear programming model with the simplex method using Python.

04 September 2017 in simplex + python + constraint-programming + linear-programming + optimization


Simplex: Dual problem

Explanation and programming of the dual simplex problem in python.

16 August 2017 in simplex + python + constraint-programming + linear-programming + optimization


Simplex: Convert to standard form

Converting any linear program into its standard form. Addition to my in depth explanation of the simplex method.

12 August 2017 in simplex + python + constraint-programming + linear-programming + optimization


Simplex algorithm: Maximization problems

In depth explanation and programming of the simplex method with Python for solving linear programming problems.

27 July 2017 in simplex + python + constraint-programming + linear-programming + optimization


Str8ts solved using Constraint programming

Solving Str8ts puzzles using constraint programming and graph theor

28 March 2017 in puzzle + str8ts + python + constraint-programming + optimization


Sudoku puzzles, Constraint programming and Graph Theory

Solving Sudoku puzzles using constraint programming and graph theory with Python.

08 February 2017 in puzzle + sudoku + python + constraint-programming + optimization + graph-theory


Solving the Megaron-Cube with Python

Solving the Megaron-Cube with Python

19 September 2016 in puzzle + megaron + python


Improve MNIST using your own handwritten digits

Train your own MNIST dataset to improve accuracy using Python and tensorflow

10 July 2016 in neural nets + machine learning + tensorflow


5 Steps to your own Memory Palace

Learn something in a different way, using your own memory palace.

18 April 2016 in brain + memory + learning


Recognize your handwritten numbers

Recognize not only digits but whole handwritten numbers with Python and tensorflow using the MNIST dataset.

02 March 2016 in neural nets + machine learning + tensorflow


Analyze your Facebook messages

Analyze your Facebook messages using Python and matplotlib

18 January 2016 in analyze + facebook


Tensorflow, MNIST and your own handwritten digits

Real world MNIST detection. Build a python script to recognize your own handwritten digits using Tensorflow.

17 November 2015 in neural nets + machine learning + tensorflow


Virtual Whiteboard

Creating a virtual collaborative whiteboard

18 October 2015 in sockets + js + javascript


Titanic Disaster

How likely would you have survived the disaster?

15 September 2015 in kaggle + neural nets + machine learning


Visualizations Census 2013

How to visualize using Python

10 August 2015 in kaggle + Visualization


Learning using a sigmoid neuron

The first learning steps

18 June 2015 in machine learning + neural nets


First steps

First steps in machine learning. What are neural nets?

18 May 2015 in machine learning + neural nets


Pilot

Things about me and this blog

15 May 2015 in about me




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