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C#.NET Implementation of K-Means Clustering Algorithm to Produce Recommendations

by Arthur V. Ratz

In this article we'll demonstrate the implementation of k-means clustering algorithm to produce recommendations.

Optimal Control of a Quadcopter

by Igor Ladnik

Automatic generation of optimal control policies for the basic quadcopter flight modes

Permutations: Fast Implementations and a New Indexing Algorithm allowing Multithreading

by Eric Ouellet, Sani Huttunen

Fast implementations of permutation algorithms

Back to the Future – Decapsulation

by Dmitriy Gakh

Development in C# without care of resource consumption can lead to overloading the system. This article describes a case with large waste of memory and CPU time and how to avoid it.

Latest Articles

Using a Variation on RLE to Achieve Lossless Compression for Near-consecutive or Grouped Tabular Data

by Jack Devey

Introducing a lossless compression mechanism for data structured in a table or matrix

Perceptual Hash based Image Comparison: Coded in "plain old C". An Anecdotal View

by GeorgeDS

An anecdotal report describing issues encountered in coding a minimal perceptual hash capability, in plain old C, in to 35 year old rolling development, with the goal of running on a noob Win 10/11 installation.

Scientific Software in Your Hand

by Mirzakhmet Syzdykov

Science and programming on working examples

by Mirzakhmet Syzdykov

Traveling Salesman Problem using Ant Colony Optimization

All Articles

Algorithms

C#.NET Implementation of K-Means Clustering Algorithm to Produce Recommendations

25 Dec 2016 by Arthur V. Ratz

In this article we'll demonstrate the implementation of k-means clustering algorithm to produce recommendations.

Optimal Control of a Quadcopter

20 Jun 2022 by Igor Ladnik

Automatic generation of optimal control policies for the basic quadcopter flight modes

Permutations: Fast Implementations and a New Indexing Algorithm allowing Multithreading

11 Oct 2022 by Eric Ouellet, Sani Huttunen

Fast implementations of permutation algorithms

multi-threading

Back to the Future – Decapsulation

28 Aug 2015 by Dmitriy Gakh

Development in C# without care of resource consumption can lead to overloading the system. This article describes a case with large waste of memory and CPU time and how to avoid it.

Machine Learning - Opinion and Text Mining by Naive Bayes Classifier

26 Apr 2018 by Mahsa Hassankashi

Best practice for opinion and Text Mining based on Naïve Bayesian Classifier.

machine-learning

Implementing K-Means Image Segmentation Algorithm

29 Aug 2017 by Arthur V. Ratz

How to implement k-means clustering algorithm to perform graphical raster image segmentation

2-D Interpolation Functions

13 Sep 2021 by Mircea Neacsu

Various algorithms for 2D interpolation

Simulator 6 Axis Articulated Robots

7 Apr 2014 by jurhas

A small simulator for a 6 axis articulated robot

microcontroller

Backgammon Artificial Intelligence

2 May 2022 by KristianEkman

How to build an AI which plays Backgammon

artificial-intelligence

machine-learning

Implementing Auto-tiling Functionality in a Tile Map Editor

7 Sep 2010 by Colin Vella

This article presents an algorithm and data structures to implement auto-tiling as seen in RPG Maker, the Starcraft level editor, etc.

Karatsuba Long Multiplication Algorithm

11 Jan 2023 by Andrea Simonassi

A simple yet powerful multiplication algorithm

Edumatter-814: School Math Calculators and Equation Solvers

17 Feb 2015 by DrABELL

Educational software package for Microsoft Windows® 7/8 contains “5-in-1” School Math Calculators and Equation Solvers intended for students and educators

A Particle Swarm Optimizer In C#

6 Sep 2016 by George Swan

An articial life algorithm that attempts to solve a problem by flying a swarm of entities through a range of possible solutions where each entity is guided by the performance of other members of the swarm

artificial-intelligence

UnitParser

1 Jun 2018 by Alvaro Carballo Garcia

Comprehensive unit parsing library

The astounding Pickover's biomorphs

27 Nov 2017 by Miguel Diaz Kusztrich

An infinite set of biological shape fractals in the complex plain

Retro Game Cartography: Part Deux

9 Sep 2021 by Mladen Janković

Improved algorithm for reconstructing game world map from captured game play

Singular Values Decomposition (SVD) in C++11 by an Example

30 Dec 2018 by Arthur V. Ratz

SVD in C++11 explained with an example

Enumerating All Cycles in an Undirected Graph

9 Sep 2018 by Philipp Sch

Finding a fundamental Cycle Set forming a complete basis to enumerate all cycles of a given undirected graph

Simple Fast Adaptive Grid to Accelerate Collision Detection between AABB of Particles

16 Apr 2022 by tugrulGtx

A walkthrough for a grid implementation of "particle in cell" problem to improve performance of axis-aligned bounding-box (AABB) collision checking in various scenarios

RLE: The Human Friendly Compression

16 Apr 2022 by Patrice T

RLE (Run Length Encoding): The Human Friendly Compression

Hex 2048 - A Numbers Game

6 Oct 2020 by Christ Kennedy

A graphically bouncy and colorful version of the popular numbers tile-sliding game

A Simple, Portable Yet Efficient Quicksort Implementation in C

13 Oct 2013 by Member 9294701

A simple, portable yet efficient Quicksort implementation in C

Bernoulli Factory Algorithms

2 Sep 2021 by Peter Occil

Algorithms to turn biased "coin flips" into biased "coin flips", and how to code them.

Content-Aware Image Resizing in JavaScript

19 Jan 2022 by trekhleb

JavaScript implementation of so-called Seam Carving algorithm for content-aware image resizing

Can QR Decomposition Be Actually Faster? Schwarz-Rutishauser Algorithm

3 Jan 2022 by Arthur V. Ratz

Optimizing the performance of the large-sized matrices QR factorization and eigendecomposition, using Schwarz-Rutishauser algorithm

Interval arithmetic using round-to-nearest mode (part 1 of n)

27 Oct 2015 by Daniel Pfeffer

A faster method for performing interval arithmetic

cobj: Polymorphism in Plain C

7 Jun 2016 by GProssliner

cobj is a preprocessor based generator for interface based polymorphism

microcontroller

Corona SEIR Workbench

24 Apr 2022 by Marcus Müller

Pandemic SEIR and SEIRV modelling software and infrastructure for the Corona SARS-COV-2 COVID-19 disease with data from Johns-Hopkins-University CSSE, Robert Koch-Institute and vaccination data from Our World In Data.

Tides of Time Bot and Game – Application of Minimax (with Alpha Beta Pruning)

13 Mar 2019 by Oana Mancu

Any deterministic game can be broken down to its core functionalities. By understanding them, one can implement fundamental algorithms such as Minimax (with alpha beta pruning), thus paving the way towards a better AI opponent.

artificial-intelligence

EpForceDirectedGraph.cs- A 2D/3D force directed graph algorithm in C#

26 Oct 2014 by Chris La

A 2D/3D force directed graph algorithm in C#

Multi-pass Filter Cutoff Correction

26 Nov 2018 by Jonas Selling

Clarifying the use of multi-pass filter cutoff correction

Three Approaches for Machine Learning

4 Sep 2020 by Mosi_62

Logistic regression, back propagation and support vector machine in comparison on the Iris data set

artificial-intelligence

Python Fourier Transform Helper Library

13 Apr 2022 by Steve Hageman

A Python Library to help make properly scaled Fourier Transforms including utility functions

frequency-analysis

An Optimal Wagner-Fischer Algorithm For Approximate Strings Matching In Python And NumPy

16 Sep 2022 by Arthur V. Ratz

Compute the Levenshtein distance of literal strings effectively by using the Wagner-Fischer (two matrix rows-based) algorithm.

syncronizing subtitles by using translation and time series algorithms

29 Sep 2013 by Amit Bezalel

Transfering subtitle synchronization from one subtitle file to another

Algorithmic approaches to solving the Pascal's Triangle and the Newton's Binomial

18 Aug 2014 by José Cintra

Some suggestions of algorithms for solving the Pascal Triangle, addressing iterative, recursive and functional paradigms

The Amazing Performance of C++17 Parallel Algorithms, is it Possible?

25 Nov 2018 by Bartlomiej Filipek

What performance can we get from C++17 parallel algorithms?

HotPoints - A New Method for 2D Polyline Vertex Smoothing

30 Apr 2021 by ADMGNS

An alternative method to Catmull-Rom, Chaikin or Bezier curve smoothing methods

Perceptual Hash based Image Comparison: Coded in "plain old C". An Anecdotal View

N 4 Jun 2023 by GeorgeDS

An anecdotal report describing issues encountered in coding a minimal perceptual hash capability, in plain old C, in to 35 year old rolling development, with the goal of running on a noob Win 10/11 installation.

Sound in games - Rooms

31 Jul 2012 by Kenneth Haugland

How to calculate a reverbration time in a room

Generic XOR-Coded Lists

4 Mar 2016 by JorgeLuisOrejel

This article is based on Chapter 2 of my unpublished textbook “Applied Algorithms and Data Structures.”

The New Era Of Clustering: CLOPE Algorithm in C#.NET

27 Apr 2018 by Arthur V. Ratz

In this article, we will formulate and discuss CLOPE data mining clustering algorithm that allows to drastically increase the quality and efficiency of categorized data clustering and can be easily used for recommendation-specific purposes

Ms. Wordbler - A Cute Little Warbler!

11 Apr 2019 by Mehedi Shams

Word-making game!

Gradient Color Picker - Revised Again

14 Jun 2021 by gggustafson

This article revises an earlier revision of the Gradient Color Picker (V2). The incentive for the revision was a reader request for a larger number of initial color choices.

Quantum Computer and Algorithms 1

19 May 2014 by databaseobjectmodel

Genetic algorithm to solve 2D Mazes in Visual Basic

8 Feb 2015 by Emiliano Musso

How to apply GA techniques fo solving problems in VB.NET. The example shows how to create solutions for a 2D maze, which will evolve to find the shortest path between two points.

Partially-Sampled Random Numbers for Accurate Sampling of Continuous Distributions

16 Mar 2022 by Peter Occil

Python code for partially-sampled random numbers for accurate arbitrary-precision sampling

Validation of Interpreted Colors

26 Apr 2021 by gggustafson

How well does the Interpolation of Colors match the Colors produced by Microsoft's Linear Gradient Brush?

Develop Your Own Language Translation System

10 Aug 2010 by anshulskywalker

Understanding of Example Based Machine Translation (EBMT) system and how to create your own using exisiting tools

Converting Postfix Expressions to Infix

20 Jun 2012 by Andreas Gieriet

This is an alternative for "Converting Postfix Expressions to Infix"

2 Dec 2017 by Alvaro Carballo Garcia

Library extending the .NET numeric support

AI Emotion Detection in the Browser with Transfer Learning and TensorFlow.js

19 Aug 2020 by MehreenTahir

In this article we create a web app that trains the classifier on the go and recognizes grumpy facial expressions.

artificial-intelligence

Construction of Sparse Matrices for Finite Elements with TBB Containers and OpenMP

6 Oct 2021 by Igor Gribanov

An efficient algorithm for assembling sparse matrices in Compressed Sparse Row (CSR) format.

Least Squares: A Matrix Approach in Java

17 Apr 2023 by Mark H Bishop

Computational classes and a GUI interface to illustrate usage

Association Rules Learning (ARL): Part 2 - FPGrowth Algorithm

20 Jul 2019 by Arthur V. Ratz

How to perform ARL by using FPGrowth algorithm

AllInOne ImageGrassy: The Ultimate Photo Editing Tool

4 Sep 2013 by Grasshopper.iics

You would never want to use another photo editor in your AIO again

image-processing

Task Scheduler Service on JavaScript for WEB

14 Aug 2015 by Maxim Komlev

Task Scheduler JavaScript library

Using Handles and Intrusive Reference Counters in Multithreaded Environment in C Language

15 Sep 2015 by Vladimir Pavluk

Smart pointers implementation in C

multi-threading

Graph Intersection - A Map Reduce Approach with Akka

14 Dec 2016 by Paolo Parise

Graph intersection using map reduce and Akka

Recurrence plots in C#, extending WinRQA application

29 Nov 2016 by Miguel Diaz Kusztrich

Adding tools to help estimate the correct delay and embedding dimension

Smart Decimation: Polyline Simplification and Smoothing

6 Aug 2022 by ADMGNS

A new method for 2D polyline simplification and also smoothing that alternative to Douglas-Peucker and curvature-based simplification algorithms

Segmented Map, a Compromise Between Flat Map and std::map

18 Sep 2022 by Mikhail Semenov

This article proposes a mapping algorithm, called Segmented Map, which is almost as fast as Flat Map is random access and enumeration of elements and close to std::map in insertion of elements.

Summation of Series with Convergence Acceleration

9 Feb 2023 by Kenneth Haugland

How to speed up convergence of mathematical series

Algorithm : Calc Convex Hull & Draw HTML5 Canvas (Part 2 of N)

26 Apr 2016 by raddevus

Adding more methods (select points, draw triangles, etc) which allow us to do some specialized drawing on the HTML5 Canvas so we can investigate the Calc Convex Hull algorithm.

Simple Linear Regression from Scratch in Rust

14 Dec 2018 by Philipp_Engelmann

Simple Linear Regression from scratch in Rust

machine-learning

Call Distribution Parameters using Combined Data Points Splicing

31 Mar 2021 by Fedor Naumenko

Find type of distribution and parameters from set of distributed physical values

Incremental construction of DFA in F#

3 Aug 2016 by Vyacheslav Chernykh

F#-implementation of algorithm for incremental construction of minimal deterministic finite automata through adding and removing strings.

SPL: a database language featuring easy writing and fast running

28 Jun 2022 by Jerry Cruise

Innovations against the shortcomings of SQL have been made to SPL. SPL redefines and extends many operations of structured data, specifically, it adds the discreteness, enhances ordered computation, implements a thorough set orientation, supports object references, and advocates stepwise operation.

data-processing

Sorting Variable Length Strings in O(N) Time

7 Nov 2012 by Roger Doss

The algorithm described herein is designed to implement sorting of variable length strings in O(n) time.

Gaussian Multivariate Distribution -Part 1

17 Aug 2014 by pi19404

Multi Variate Gaussian Distribution - Part 1

Algorithm : Calc Convex Hull & Draw HTML5 Canvas (Part 1 of 2)

24 Apr 2016 by raddevus

Step by step walk-through with progressive versions of code downloads will take you from the basics of drawing on HTML5 Canvas while studying an interesting point-connecting algorithm.

Worksheet Forms using WPF style architecture

21 Jun 2016 by Dave “DWC” Curry

This tutorial will show you a good starting point for a WPF style framework which aims to make creating and maintaining Excel-worksheet-forms easier.

Find the First Number k Divisible by Given Number n (Extended Approach)

15 Jul 2018 by Nour Helal

Find the first number k divisible by given number n (extended approach)

Integer Factorization: Optimizing Small Factors Checking

16 Jan 2021 by Patrice T

How to optimize small factors checking

Rogue Wave CodeDynamics: A Review

17 Nov 2015 by Chris_Riley

My deep dive into Rogue Wave’s CodeDynamics product was to address a challenge I had been facing since my college days: the debugging of a genetic algorithms (GA) application.

Lightning-Fast R Machine Learning Algorithms

3 Nov 2016 by Intel

Get Results with the Intel® Data Analytics Acceleration Library and the Latest Intel® Xeon Phi™ Processor

machine-learning

product-showcase

How to Use a Virtual CPU to Emulate and Analyze Suspicious Code Execution at Runtime

20 Nov 2018 by Apriorit Inc, Artem K.

Find out approaches which you can use to improve runtime algorithms for zero-day threat detection

Using Hana and SageMaker to Solve for Adverse Drug Effects

30 Oct 2019 by Wayne Applebaum

Discussion of the issues of identifying adverse drug effects and how machine learn and big data techniques can solve for them.

machine-learning

How To Implement A Parallel "Stable" Three-Way Quicksort Using Intel C++ Compiler And OpenMP 4.5 Library

7 May 2020 by Intel, Arthur V. Ratz

I will discuss how to deliver the modern code, using Intel C++ Compiler and OpenMP 4.5 library, that implements the parallel "stable" three-way quicksort, based on the parallel code that has already been discussed in the previous article.

Knight's Tour on a Square Chess Board: Coding Challenge

14 Mar 2017 by Thomas Daniels

This article is a solution to CodeProject's Weekly Challenge: "A knight on a chess board".

Security on the Web by Advanced Encryption Standard (AES) and Security Assertion Markup Language (SAML)

3 Apr 2019 by Mahsa Hassankashi

Best approach for having more secure channel to transfer user information throughout the web

Introduction to B-trees: Concepts and Applications

31 Mar 2023 by Ștefan-Mihai MOGA

How to solve real-life problems using B-trees

Android Sensor Fusion Tutorial

18 Feb 2014 by Paul Lawitzki

This article presents one approach to increase the quality of rotation information gathered from different sensor sources using a simple sensor fusion algorithm, specifically on an Android device.

Efficient Algorithms to Trim In-String White Spaces

14 Aug 2015 by DrABELL

This is an alternative for "Fastest method to trim all whitespace from Strings in .NET"

Fast and improved 2D Convex Hull algorithm and its implementation in O(n log h)

1 Mar 2018 by Omar Saad (IREQ), Eric Ouellet

Many improvements over a pretty new and unknown very fast 2D Convex Hull algorithm and much more.

Image Tracking and Computer Vision Using Fourier Image Correlation

23 Apr 2013 by HoshiKata

How to teach a program to recognize something within a video stream.

Logical Calculation with Tableaux

29 Jan 2017 by Miguel Diaz Kusztrich

Demonstrate or refute a conclusion automatically from a series of premises

artificial-intelligence

Automatic Image Stitching with Accord.NET

23 Dec 2014 by César de Souza

Demonstration of automatic image stitching by interest point matching using the Accord and AForge.NET Frameworks

artificial-intelligence

Apex memmove - the fastest memcpy/memmove on x86/x64 ... EVER, written in C

5 Jul 2016 by T. Herselman

2 years ago I went OCD on memcpy/memmove; and wrote over 140 variations (80,000 lines of code) of memmove; testing, disassembling, optimizing and benchmarking them on multiple machines. I never released the article or the code; until now! So I need to do it before I loose my mind!

On Convex Polytopes, Collision Detection, and the Simplex Method

7 Jun 2016 by Andreas Michael Kreuzer

This article is about collision detection for convex polytopes using the simplex method.

Demystify C# floating-point equality and relation operations

14 May 2012 by Andreas Gieriet

Make floating point equality and relation operators reliable based on a comparison epsilon value.

Lightning-Fast Access Control Lists in C#

10 Dec 2015 by Daniel Miller

This article describes the C# implementation for a high-performance role-based access control list.

Your Digital Fountain

28 Nov 2014 by Omar Gameel Salem

Reliable transmission of bulk data over lossy connection without worrying about packets loss

JavaScript oAuth

10 Jul 2014 by Ricardo Lynch

Using JavaScript for oAuth with three major identity providers: Facebook, Google, and Twitter.

Yet another implementation of a lock-free circular array queue

31 Jul 2015 by Faustino Frechilla

A circular array based lock-free queue with no memory allocation on the heap and no ABA problem

Fundamentals of Image Processing - behind the scenes

10 Jan 2017 by Jakub Szymanowski

The article presents idea and implementation of fundamental algorithms in image processing.

Math Equation Parsing using Call Stacks

3 Apr 2014 by Chris Copeland

Using call stacks, rather than Regular Expression, to deconstruct mathematical formulae and calculate values.

Random Forest Python

3 Apr 2019 by Mahsa Hassankashi

This article provides python code for random forest, one of the popular machine learning algorithms in an easy and simple way.

machine-learning

Using Genetic Algorithm To Solve Perfect Matching Problem

27 May 2014 by Emre Ataseven

This article is written to demonstrate how could we use genetic algorithm to solve a NP-Complete problem, I used fixture generation problem as sample.

Priori - A Fast dynamic_cast<> Alternative

20 Jun 2013 by DigitalInBlue

This article discusses the implementation and use of a fast alternative to dynamic_cast, Priori.