Blog Archives

Learning Data Science: Predicting Income Brackets

March 19, 2019
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Learning Data Science: Predicting Income Brackets

As promised in the post Learning Data Science: Modelling Basics we will now go a step further and try to predict income brackets with real world data and different modelling approaches. We will learn a thing or two along the way, e.g. about the so-called Accuracy-Interpretability Trade-Off, so read on… The data we will use … Continue reading "Learning...

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Learning R: The Collatz Conjecture

March 12, 2019
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Learning R: The Collatz Conjecture

In this post we will see that a little bit of simple R code can go a very long way! So let’s get started! One of the fascinating features of number theory (unlike many other branches of mathematics) is that many statements are easy to make but the brightest minds are not able to prove … Continue reading "Learning...

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Evolution works!

March 5, 2019
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Evolution works!

Hamlet: Do you see yonder cloud that’s almost in shape of a camel? Polonius: By the mass, and ’tis like a camel, indeed. Hamlet: Methinks it is like a weasel. from Hamlet by William Shakespeare The best way to see how evolution works, is to watch it in action! You can watch the evolution of … Continue reading "Evolution...

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Customers who bought…

February 26, 2019
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Customers who bought…

One of the classic examples in data science (called data mining at the time) is the beer and diapers example: when a big supermarket chain started analyzing their sales data they encountered not only trivial patterns, like toothbrushes and toothpaste being bought together, but also quite strange combinations like beer and diapers. Now, the trivial … Continue reading "Customers...

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To understand recursion you have to understand recursion…

February 19, 2019
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To understand recursion you have to understand recursion…

Sorting values is one of the bread and butter tasks in computer science: this post uses it as a use case to learn what recursion is all about. It starts with some nerd humour… and ends with some more, so read on! Have a look at the following code and try to understand it: Obviously … Continue reading "To...

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So, what is AI really?

February 12, 2019
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So, what is AI really?

One of the topics that is totally hyped at the moment is obviously Artificial Intelligence or AI for short. There are many self-proclaimed experts running around trying to sell you the stuff they have been doing all along under this new label. When you ask them what AI means you will normally get some convoluted … Continue reading "So,...

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Learning Data Science: Modelling Basics

February 5, 2019
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Learning Data Science: Modelling Basics

Data Science is all about building good models, so let us start by building a very simple model: we want to predict monthly income from age (in a later post we will see that age is indeed a good predictor for income). For illustrative purposes we just make up some numbers for age and income, … Continue reading "Learning...

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Hash Me If You Can

January 29, 2019
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Hash Me If You Can

We are living in the era of Big Data but the problem of course is that the bigger our data sets become the slower even simple search operations get. I will now show you a trick that is the next best thing to magic: building a search function that practically doesn’t slow down even for … Continue reading "Hash...

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If wealth had anything to do with intelligence…

January 23, 2019
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If wealth had anything to do with intelligence…

…the richest man on earth would have a fortune of no more than $43,000! If you don’t believe me read this post! Have you ever thought about the distribution of wealth as a function of some quality? Especially rich people pride themselves on extraordinary abilities, so that they somehow “deserve” their wealth. Now “abilities” is … Continue reading "If...

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Understanding the Magic of Neural Networks

January 15, 2019
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Understanding the Magic of Neural Networks

Everything “neural” is (again) the latest craze in machine learning and artificial intelligence. Now what is the magic here? Let us dive directly into a (supposedly little silly) example: we have three protagonists in the fairy tail little red riding hood, the wolf, the grandmother and the woodcutter. They all have certain qualities and little … Continue reading "Understanding...

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