Blog Archives

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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Understanding the maths of Computed Tomography (CT) scans

January 9, 2019
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Understanding the maths of Computed Tomography (CT) scans

Noseman is having a headache and as an old-school hypochondriac he goes to see his doctor. His doctor is quite worried and makes an appointment with a radiologist for Noseman to get a CT scan. Because Noseman always wants to know how things work he asks the radiologist about the inner workings of a CT … Continue reading "Understanding...

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Check Machin-like formulae with arbitrary-precision arithmetic

January 3, 2019
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Check Machin-like formulae with arbitrary-precision arithmetic

Happy New Year to all of you! Let us start the year with something for your inner maths nerd 🙂 For those of you who don’t yet know Rosetta Code: it is a real cool site where you can find lots of interesting code examples in all kinds of different languages for many different tasks. … Continue reading "Check...

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Clustering the Bible

December 27, 2018
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Clustering the Bible

During this time of year there is obviously a lot of talk about the Bible. As most people know the New Testament comprises four different Gospels written by anonymous authors 40 to 70 years after Jesus’ supposed crucifiction. Unfortunately we have lost all of the originals but only retained copies of copies of copies (and … Continue reading "Clustering...

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Your AI journey… and Happy Holidays!

December 20, 2018
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Your AI journey… and Happy Holidays!

I want to draw your attention to a very valuable (and short!) whitepaper from my colleague, Professor Andrew Ng, where he shares important insights on how to lead companies into the AI era. The five steps outlined in the paper are: Execute pilot projects to gain momentum Build an in-house AI team Provide broad AI … Continue reading "Your...

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Learning R: A gentle introduction to higher-order functions

December 14, 2018
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Learning R: A gentle introduction to higher-order functions

Have you ever thought about why the definition of a function in R is different from many other programming languages? The part that causes the biggest difficulties (especially for beginners of R) is that you state the name of the function at the beginning and use the assignment operator – as if functions were like … Continue reading "Learning...

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Intuition for principal component analysis (PCA)

December 6, 2018
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Intuition for principal component analysis (PCA)

Principal component analysis (PCA) is a dimension-reduction method that can be used to reduce a large set of (often correlated) variables into a smaller set of (uncorrelated) variables, called principal components, which still contain most of the information. PCA is a concept that is traditionally hard to grasp so instead of giving you the n’th … Continue reading "Intuition...

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Why R for data science – and not Python?

December 2, 2018
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There are literally hundreds of programming languages out there, e.g. the whole alphabet of one letter programming languages is taken. In the area of data science there are two big contenders: R and Python. Now why is this blog about R and not Python? I have to make a confession: I really wanted to like … Continue reading "Why...

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OneR – fascinating insights through simple rules

November 25, 2018
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OneR – fascinating insights through simple rules

We already saw the power of the OneR package in the preceding post. Here we want to give some more examples to gain some fascinating, often counter-intuitive, insights. Shirin Glander of Muenster University tested the OneR package with data from the World Happiness Report to find out what makes people happy: https://shiring.github.io/machine_learning/2017/04/23/one_r. The whole analysis … Continue reading "OneR...

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OneR – fascinating insights through simple rules

November 24, 2018
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OneR – fascinating insights through simple rules

We already saw the power of the OneR package in the preceding post. Here we want to give some more examples to gain some fascinating, often counter-intuitive, insights. Shirin Glander of Muenster University tested the OneR package with data from the World Happiness Report to find out what makes people happy: https://shiring.github.io/machine_learning/2017/04/23/one_r. The whole analysis is … Continue reading "OneR...

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