May 3The water level on Lake Neusiedl in 2022 — viewpoints of a sailor and statistician(this article is also available in German, an update for 2023 is available) Version 1.0 | 2022 May 09 | Initial Version in German, Translated to English I have been sailing on Lake Neusiedl, in Austria, since I was a child, in all different kinds of boats. …13 min read13 min read
May 3Wann, wenn nicht jetzt? — Segeln am Neusiedler See in der Saison 202313. bis 15. April 2023: Es regnet! Und das nicht punktuell und kurz aus einer Wolke, sondern lange und flächendeckend. Ein Genuss für alle, die sich um den Wasserstand des Neusiedler Sees Gedanken machen. Und der Wasserstand steigt. Um knapp 11 cm. Es gibt sie also doch noch; die Tage…Environmental Statistics7 min readEnvironmental Statistics7 min read
May 9, 2022Der Wasserstand am Neusiedler See im Jahr 2022 — Sichtweisen eines Seglers und Statistikers(for my English audience: this article is first published in German, an English version will follow) Version 1.0 | 2022/05/09 | Erstversion des Articles Update 1.1 | 2023/05/03 | weiterer Artikel: Wann, wenn nicht jetzt- Segeln am Neusiedler See in der Saison 2023. Link Kurzfassung Lassen wir uns nicht täuschen Wenn man jetzt im Mai in…Data Science14 min readData Science14 min read
Published inMLearning.ai·Mar 31, 2022You just found out that the quality of your analysis data is poor — What are your options?You find out that the data quality of your analysis data does not fulfill the defined requirements. What should you do? Close the eyes and walk through? Stop the project and wait until things get better? Can analytics help you to overcome these obstacles? This articles discusses your options and…Data Quality10 min readData Quality10 min read
Published inMLearning.ai·Mar 10, 2022Determining the best length of the history of your timeseries data for timeseries forecastingIntroduction This article examines the influence of the length of the available data history of a time series on the quality of the forecast for future periods. The results of simulation studies that are presented in this article address the importance of long time histories to performing good time series forecasting. …Ml So Good10 min readMl So Good10 min read
Published inMLearning.ai·Feb 23, 2022The effect of (bad) Data Quality on Model Accuracy in Supervised Machine Learning — Results from Simulation StudiesData quality obviously plays an important role for data science and the validity of the received results. This article addresses the case where data quality cannot be improved retrospectively and you need to perform your analyses on this data. Simulation studies for supervised machine learning have been applied to quantify…Ml So Good14 min readMl So Good14 min read
Published inMLearning.ai·Feb 3, 2022Quantifying the Effect of Missing Values on Model Accuracy in Supervised Machine Learning ModelsProblem description Observations with missing values cannot be used by many supervised machine learning techniques like regression methods or neural network methods. Decision trees can handle missing values in the input data because they consider them as a separate category in the data and assign them to one of the branches. The…Data Science12 min readData Science12 min read
Dec 8, 2021Explaining Sign Inversion of Parameter Estimates in Multiple Regression Models — A Story-Telling ApproachExplaining ML models — Classical multiple regression models can be a challenge as well Interpretability and explainability of machine learning models has always been a hot topic. …Machine Learning6 min readMachine Learning6 min read
Jul 28, 2021Is your data ready for data science? — Motivating this topic from a sail-race-analysis exampleBeside data science and analytics, my other passion is sailing. Sometimes I enjoy a relaxing trip with friends or alone, on other days I like the challenge and participate in a few local sail races on our lake. When trying to optimize the boat speed and my race performance, I…Data Science6 min readData Science6 min read
Feb 12, 2021My Dad has the most interesting job in the world. He is a data scientist.My name is Daniel and I am in 4th grade. This week, parents were invited into my school to tell us about their work. After careful consideration, I allowed my father to come, although I was a bit worried about it. After all, if he gave a bad presentation, I…Data Science Education5 min readData Science Education5 min read
