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
Spark StreamingClickhouse and KafkaClickhousePyspark streaming from and to csv-file in Zeppelin: basic code exampleKafka Streaming ExampleSome handy Kafka commands (that I keep forgetting)Kafka Streaming Json using Gson: How to rename a json field? (Actually this is a Gson topic)Link to book "Spark The Definite Guide"
Machine Learning
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Understanding the Bivariate Normal Distribution: A Mathematical Derivation of Its Probability Density FunctionUnderstanding 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
What is a Logit?The Sigmoid and its DerivativeMastering the Softmax Function: Understanding its Derivative with a Step-by-Step ExampleUnderstanding the Directional Derivative and the GradientUnderstanding the Bivariate Normal Distribution: A Mathematical Derivation of Its Probability Density FunctionExpectation Maximization
Math
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Understanding the Bivariate Normal Distribution: A Mathematical Derivation of Its Probability Density FunctionHow to Create a Bivariate Normal Random Vector from Two Independent Normals?A Beginner-Friendly, yet Mathematical Introduction to Confidence IntervalsUnderstanding 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?
VarianceStars 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 matterkleiner GaussJupyter-Notebook: Confirming frequentists interpretation of conditional dependencyVariance, Covariance, Autocovariance...what?Understanding the probability density function of the normal distributionMaximum Likelihood EstimationWhich envelope should you choose?
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