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Munich Datageeks - June Edition

The summer is back in Munich and so are the Datageeks. This time we will get together at the offices of our first time sponsor Codecentric. Special thanks to them in advance.

The format is as always:
- 2 presentations (each ca. 30-40 min incl. discussion) 
- time for networking + food + drinks before, in between and especially after the presentations 
- talks are held in English 

The line up:

1) Mathias Fuchs
Topic: "How to measure the performance of a machine learning algorithm"

Talk Description 
Machine learning has seen an impressing boom in the past years. In practice, every learning algorithm has to prove its worth by better classification/prediction performance than previous algorithms. However, obvious performance measures such as the misclassification rate and so on suffer a high variability across data-sets or even re-sampling iterations. Thus, it is a challenging problem to assess the performance reliably, and its importance has been given surprisingly little attention in literature and practice. I will talk about the usual performance measures such as misclassification rate, AUC or mean squared error etc. I will explain cross-validation and its pitfalls. Finally, I will show you a new method to estimate the variability of the performance estimators in a general and statistically correct way.

Speaker Bio
Mathias studied mathematics in Munich and Marseille. After his PhD, he went across numerical mathematics and bioinformatics, to arrive in biostatistics and machine learning where he feels at home now. Currently, he is Postdoc at the medical faculty of LMU, enthusiastic about the fascinating challenges in big-data-statistics and current machine learning.

2) Jörg Blumtritt
Topic: "Mobile data: under the hood. Generating, collecting, and processing smartphone data."

Talk Description
- The phone's sensors: from geolocation to magnetic flux (& getting access with various apps with their advantages and problems)
- Noise and artefacts
- Battery issues
- Complex event processing
- Tracking behavior
- Privacy: How to track spooky things and how to make people aware of what you are doing.

Speaker Bio
- studied statistics, mathematics, political sciences;
- has worked in behavioral science research in Max-Planck-Gesellschaft (nonverbal behavior, origins of xenophobia), for various TV networks, publishers (head of research with Hubert Burda Media), agencies (managing director MediaCom Germany),
- founded Datarella in 2012 with focus on computational social science
- blogging at

Join or login to comment.

  • Wahib Ul H.

    Hi Organizers, Unfortunately I was not able to attend the event despite the fact i really wanted to be there. Can you please upload the presentation of Topic: "Mobile data: under the hood. Generating, collecting, and processing smartphone data." This topic is really interesting for me and useful as well. Danke !

    June 5, 2014

  • Raymond Georg S.

    Thanks a lot to everyone for attending the meetup - especially the two speakers with two very different but both very interesting talks. And thanks also for the organizers Florian and Miguel who brought so many DataGeeks to the codecentric office. You all were great guests!

    June 5, 2014

  • A former member
    A former member

    June 4, 2014

  • Florian H.

    We just got notice that it won't be possible to fit 100+ people into the location of this meetup - rather half that number :) Based on experience, a couple signed up data geeks won't show up anyways. Also, I just set the attendee limit to 85 (but can't see any changes on the event page). In any case, please be aware that it might get quite crowded. Everyone is still welcome of course!

    May 30, 2014

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