Blog Archives

Optimising your blog with R and Google Optimize

April 14, 2017
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Optimising your blog with R and Google Optimize

When writing a blog, sooner or later, one measures and consequently tries to improve some kind of success metric. In my case; I have been tracking user behavior (visitors, bounce rate, pageviews, …) for slightly over a year with Google Analytics. Whi...

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Extending existing packages: Rmisc

April 10, 2017
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Extending existing packages: Rmisc

One of my favorite packages is Rmisc. The package includes the summarySE function which I use on a daily basis. The function provides a concise way to get a data frame with mean and standard errors of the mean. It is a great way in conjunction with ggp...

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From Descriptive to Prescriptive Analytics

February 14, 2017
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From Descriptive to Prescriptive Analytics

Predominately data science projects deal with descriptive statistics. The common theme (especially on this blog) is to gather a dataset, visualize and describe it. The toolset consists of a combination of machine learning, descriptive statistics and (...

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The Instant Rise of Machine Intelligence?

December 28, 2016
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The Instant Rise of Machine Intelligence?

Currently the news are filled with articles about the rise of machine intelligence, artificial intelligence and deep learning. For the average reader it seems that there was this single technical breakthrough that made AI possible. While I strongly bel...

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Image description with Microsoft’s Cognitive Services and R

December 13, 2016
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Image description with Microsoft’s Cognitive Services and R

A while back, I created the small package Roxford to access Microsoft’s Cognitive Services API in order to easily recognize objects in images. Back then Microsoft called the service “Project Oxford”, hence the name “Roxford”. Since then Micro...

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How to create a ggplot Theme – Unicorn Edition

November 29, 2016
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How to create a ggplot Theme – Unicorn Edition

Themes are an convenient way to give ggplot charts an individualized, sometimes stylish look. Most of the time, I rely on the ggthemes package and the Economist style. Last week colleagues asked me to change the look of my charts. We joked around and I...

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Maps II – How does Competition affect Gas Prices?

November 14, 2016
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Maps II – How does Competition affect Gas Prices?

In the last post, I mapped gas stations and gas prices in Germany. After posting it, I started to look at the dataset from a different angle. The starting question was; “How can I model gas prices? What are the influencing factors?” One well know...

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Maps are great – German Gas Prices illustrated

November 12, 2016
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Maps are great – German Gas Prices illustrated

One of the most appealing data visualisation charts are maps. I love maps as they combine an incredible information density with intuitive readability. Also I feel that most people prefer maps over other visualisations. (Is there research on this?) So...

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Digital Transformation – a German perspective

October 23, 2016
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Digital Transformation – a German perspective

Digital transformation or digital business transformation is apparently currently one of the hot topics in the German business world. What puzzles me slightly, is why just now? The digitization trend has been around for ~20 years. Established buisness ...

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Analysing the US election using Youtube data

September 18, 2016
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Analysing the US election using Youtube data

Youtube is one of the channels the candidates for the US election use extensively to promote themself. Using the public Youtube API and the R package tuber it is pretty straightforward to create a snapshop of the online discussion and sentiment. First...

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