Articles by Learning Machines

Data Science on Rails: Analyzing Customer Churn

November 5, 2019 | Learning Machines

Customer Relationship Management (CRM) is not only about acquiring new customers but especially about retaining existing ones. That is because acquisition is often much more expensive than retention. In this post, we learn how to analyze the reasons of customer churn (i.e. customers leaving the company). We do this ... [Read more...]

Extracting basic Plots from Novels: Dracula is a Man in a Hole

October 29, 2019 | Learning Machines

In 1965 the University of Chicago rejected Kurt Vonnegut’s college thesis, which claimed that all stories shared common structures, or “shapes”, including “Man in a Hole”, “Boy gets Girl” and “Cinderella”. Many years later the then already legendary Vonnegut gave a hilarious lecture on this idea – before continuing to read ... [Read more...]

Finding free science books from Springer

October 15, 2019 | Learning Machines

Today the biggest book fair of the world starts again in Frankfurt, Germany. I thought this might be a good opportunity to do you some good! Springer is one of the most renowned scientific publishing companies in the world. Normally, their books are quite expensive but also in the publishing ... [Read more...]

Summer Break: A Look back… and ahead

July 30, 2019 | Learning Machines

It was November last year when I seriously started blogging and it is time to share with you some experiences and highlights before the summer break… so read on! The first thing that really surprised me (and still surprises me) is the popularity of my blog – and I say this ... [Read more...]

Reinforcement Learning: Life is a Maze

July 16, 2019 | Learning Machines

It can be argued that most important decisions in life are some variant of an exploitation-exploration problem. Shall I stick with my current job or look for a new one? Shall I stay with my partner or seek a new love? Shall I continue reading the book or watch the ... [Read more...]

Creating a Movie with Data from Outer Space in R

July 2, 2019 | Learning Machines

The Rosetta mission of the European Space Agency (ESA) is one of the greatest (yet underappreciated) triumphs of humankind: it was launched in 2004 and landed the spacecraft Philae ten years later on a small comet, named 67P/Churyumov–Gerasimenko (for the whole timeline of the mission see here: Timeline of ... [Read more...]

Learning R: Permutations and Combinations with base R

June 3, 2019 | Learning Machines

The area of combinatorics, the art of systematic counting, is dreaded territory for many people so let us bring some light into the matter: in this post we will explain the difference between permutations and combinations, with and without repetitions, will calculate the number of possibilities and present efficient R ... [Read more...]

Learning R: Painting with Fire

May 28, 2019 | Learning Machines

A few months ago I published a post on recursion: To understand Recursion you have to understand Recursion…. In this post we will see how to use recursion to fill free areas of an image with colour, the caveats of recursion and how to transform a recursive algorithm into a ... [Read more...]

Was the Bavarian Abitur too hard this time?

May 14, 2019 | Learning Machines

Bavaria is known for its famous Oktoberfest… and within Germany also for its presumably difficult Abitur, a qualification granted by university-preparatory schools in Germany. A mandatory part for all students is maths. This year many students protested that the maths part was way too hard, they even started an online ... [Read more...]
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