Why should I care about Markov Chains? Two things: first, it is a key foundation for several Machine Learning concepts such as Hidden Markov Models (HMM) and Reinforcement Learning. Markov Chains are also used in other disciplines such as Finance (stock price movements) or in Engineering Physics (Brownian motion). …

Introduction In this article, we will discuss Decision Trees and Random Forest, two algorithms used in Machine Learning for classification and regression tasks. I will show how to build a Decision Tree from scratch using a pen and paper and how to generalise this and build a Random Forest model. Dataset Let’s…

And why you should care — Introduction What is sparse data? When representing data using a matrix, we can quantify the number of empty values it contains. This is referred to as its sparsity. A matrix (or dataset) that mostly contains zeros is called a sparse matrix. A simple example Suppose you ask 4 of your friends to give you a rating of 4…

The Hang Seng Tech index, a game changer for investors — Most investors are familiar with the NASDAQ composite index, a stock market index which is one of the three most-followed stock market indices in the United States and known to be high-tech and growth-oriented. …

Using logistic regression and key financial indicators — Introduction In this tutorial, we will be using a dataset from the Machine Learning Repository of the University of California, which contains key financial indicators about companies. We will use this data to predict if a company has filed for bankruptcy or not. To make our predictions, we will use a…

Allez les bleus! — Earlier this year, the big honcho across the channel, Emmanuel Macron, made a call to his people to “invest, work, and invent’’. France is trying to become a ‘start-up nation’, passing new laws that will hopefully see its unicorn (or licornes, as the French call them) count skyrocket. What does this mean? A unicorn…

A guide to the two most common types of database systems — An introduction to the topic For developers designing a DBMS (Database Management System), one of the first questions that arises is: which type of databases should be used, SQL or NoSQL? SQL or relational databases first came into play in the 1970s in a paper called “A Relational Model of Data for Large Shared Data…

What is a digital transformation? — People like to focus on the technology side of digital transformation. However, at its core, it’s more than technology: it is how organizations leverage the power of tech to improve customer experiences, increase operational efficiency and renew outdated business models (CDW, 2018). The main goals of a digital transformation According…

A simple, yet complicated task! — For those of you doing Data Science projects, using .csv files is an essential part of the job, especially when working with pandas dataframe. However, the question is: where do you store this .csv file so that you can easily access it in the code? To avoid any paths problems…