Blog Archives

Cluster Analysis – Naming Pattern in the last Century.

March 2, 2018
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Cluster Analysis – Naming Pattern in the last Century.

A while back I got interested in (baby) surnames. It is interesting to follow how friends name their newly born. There are various naming “strategies”, a) pick a name that has been used in previous generations but now uncommon (e.g. in Germany tha...

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tfestimators – Package: Embeddings for Categorical Variables

February 12, 2018
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tfestimators – Package: Embeddings for Categorical Variables

In my last posts (here and here) I explored how to use embeddings to represent categorical variables. Furthermore, I showed how to represent categorical variables with embeddings and add other variable to create a more complex model. Both posts focused...

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Concatenate Embeddings for Categorical Variables with Keras

February 4, 2018
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Concatenate Embeddings for Categorical Variables with Keras

In my last post, I explored how to use embeddings to represent categorical variables. Furthermore, I showed how to extract the embeddings weights to use them in another model. While the concept of embedding representation has been used in NLP for quit...

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Exploring Embeddings for Categorical Variables with Keras

January 28, 2018
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Exploring Embeddings for Categorical Variables with Keras

In order to stay up to date, I try to follow Jeremy Howard on a regular basis. In one of his recent videos, he shows how to use embeddings for categorical variables (e.g. weekdays). First off; what are embeddings? An embedding is a mapping of a catego...

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Wrapping Access to Web-Services in R-functions.

January 21, 2018
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Wrapping Access to Web-Services in R-functions.

One of the great features of R is the possibility to quickly access web-services. While some companies have the habit and policy to document their APIs, there is still a large chunk of undocumented but great web-services that help the regular data scie...

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Content Evaluation: What is the Value of Social Media?

November 19, 2017
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Content Evaluation: What is the Value of Social Media?

As most bloggers, I do check my analytics stats on a regular basis. What I do not really look at is social shares. For most blog posts traffic follows a clear pattern; 2 days of increased traffic, followed by a steady decrease to the base traffic volum...

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Deep learning and the German Data Science Job Market

October 29, 2017
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Deep learning and the German Data Science Job Market

Almost 2 years ago, I wrote a short post on the German data science market by analysing open position on the key job platforms; Stepstone, Monster and Indeed. Recently I received requests to update the post with fresh data. So here it comes. To add a ...

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IMDB Genre Classification using Deep Learning

August 30, 2017
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IMDB Genre Classification using Deep Learning

The Internet Movie Database (Imdb) is a great source to get information about movies. Keras provides access to some part of the cleaned dataset (e.g. for sentiment classification). While sentiment classification is an interesting topic, I wanted to see...

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Transfer Learning with augmented Data for Logo Detection

August 20, 2017
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Transfer Learning with augmented Data for Logo Detection

The last months, I have worked on brand logo detection in R with Keras. Starting with a model from scratch adding more data and using a pretrained model. The goal is to build a (deep) neural net that is able to identify brand logos in images. Just ...

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Transfer Learning with Keras in R

August 1, 2017
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Transfer Learning with Keras in R

In my last posts ((http://flovv.github.io/Logo_detection_deep_learning/ and here, I described how one can detect logos in images with R. The first results were promising and achieved a classification accuracy of ~50%. In this post i will detail h...

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