July 2014 – digitado

Google I/O 2014: Cloud and Android

digitado ⋅ 28 de July de 2014

It’s obvious that cloud and mobile worlds are converging. The majority of interesting mobile applications nowadays are powered by cloud, and new startups are springing up every day to fight for their niche in this transition. Check out HN in your spare time; chances are you’ll notice some new cloud-based data storage, a new way to test your apps in the cloud, or a new way to develop mobile apps using cloud-based IDEs. The importance of this convergence […]

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Dixon’s Q test for outlier identification

digitado ⋅ 19 de July de 2014

I recently faced the impossible task to identify outliers in a dataset with very, very small sample sizes and Dixon’s Q test caught my attention. Honestly, I am not a big fan of this statistical test, but since Dixon’s Q-test is still quite popular in certain scientific fields (e.g., chemistry) that it is important to understand its principles in order to draw your own conclusion of the presented research data that you might stumble upon in research articles […]

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About Feature Scaling and Normalization

digitado ⋅ 11 de July de 2014

I received a couple of questions in response to my previous article (Entry point: Data) where people asked me why I used Z-score standardization as feature scaling method prior to the PCA. I added additional information to the original article, however, I thought that it might be worthwhile to write a few more lines about this important topic in a separate article.

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