This site serves as an extension of my brain, where I gather everything related to my favorite topics that I want to remember. Some entries are thoughtful blog posts, while others are simply collections of useful links I’ve come across.
Big Data Tools
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Spark StreamingSPARK configurationPyspark streaming from and to csv-file in Zeppelin: basic code exampleHow to print DataFrame column to consoleKafka Streaming Json using Gson: How to rename a json field? (Actually this is a Gson topic)Some handy Kafka commands (that I keep forgetting)How to access your clickhouse database with Spark in PythonClickhouse
Machine Learning
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Understanding the Directional Derivative and the GradientMastering the Softmax Function: Understanding its Derivative with a Step-by-Step ExampleThe Sigmoid and its DerivativeWhat is a Logit?Expectation Maximization
Math
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Understanding the Directional Derivative and the GradientMastering the Softmax Function: Understanding its Derivative with a Step-by-Step ExampleMaximum Likelihood EstimationHow to create a random variable with a Beta distribution from scratch, using only Uniform random variablesWhich envelope should you choose?Variance, Covariance, Autocovariance...what?Stochastic Process and Time Series (this page is not ready yet)Understanding the probability density function of the normal distribution
Understanding the Directional Derivative and the GradientBasicsJupyter-Notebook: Binominal Distribution ExampleJoint, Conditional and Marginal ProbabilityJupyter-Notebook: Birthday-ProblemCountingStars and Bars Argument (Einstein-Bose) or placing n identical objects into n distinct bins, or drawing k times from n balls with replacement, order does not matterBinomial Coefficient
Network Analysis
4
networking ubuntuHow to print flow information with nfdump to csvHow to collect flows or how to install pmacct with kafka and nDPI supportDo network stuff
Programming
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Difference between function and methodVal and defCoin change problemCall by Name vs Call by Value in ScalaC Pointer and ReferenceUseful python helpersPython SnippetsJava
Website
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How to get a website containig pyscript running on a hosted domainWie kann man manuell eine html-Seite auf Ionos hochladen, um seine Domain mit der eigenen html Seite zu nutzen ohne eine teure Kauflösung?Python Naming Conventions