Published in Level Up Coding·Mar 8Member-onlyFactor Analysis for Marketing with PythonOr how to quickly uncover hidden insights in your data — What is factor analysis? Factor analysis is a statistical technique used to identify the main factors that affect a particular outcome. It involves breaking down a complex phenomenon into its individual components, and then analyzing the effect of each component on the outcome. Take the image below as an example:Marketing6 min readMarketing6 min read
Published in Geek Culture·Feb 24Member-onlyData Analysis for Marketing: an OverviewUncovering insights and patterns through data analysis — Exploratory data analysis is a crucial step in the data science workflow, allowing us to understand, summarize, and visualize our data in order to uncover patterns and relationships. By using a variety of statistical and graphical methods, we can gain valuable insights that can inform our subsequent analysis and decision-making. …Data Analysis6 min readData Analysis6 min read
Published in Geek Culture·Feb 12Member-onlyAdvanced SQL Tips and Tricks for Data AnalystsAdvanced tricks that will save you time and improve your code's performance — Basic SQL can be pretty straightforward. Doing SQL well and properly for advanced use cases is not that easy, though. Here are a few more advanced SQL tips and tricks that will help you do more complex queries, or just do the basic ones better: Common Table Expressions (CTEs) CTEs allow you to break…Sql5 min readSql5 min read
Published in Level Up Coding·Jan 23Member-onlyThe Ultimate SQL Learning Track for Data AnalysisFollow this track and build a solid SQL foundation for data analysis — I feel that many SQL learning methods spend too much time on things that are useless for data analysis, and leave out important details. With that in mind, I have created this learning track for data analysis, tailored for beginners that want to learn SQL from scratch and get good…Sql5 min readSql5 min read
Published in DataDrivenInvestor·Jan 21Member-onlyThe Ultimate Tableau Learning TrackFollow this track and build a solid Tableau foundation for data analysis — I learned how to use Tableau by trial-and-error, and would have loved to have a structured learning path to help me in my journey. So, I’ve decided to create one myself, loosely based around their certification track. Regardless of getting the certifications, I think the process of preparing for them…Tableau4 min readTableau4 min read
Published in Geek Culture·Jan 20Member-onlyBayesian Time Series ForecastingTheory and practice using PyBATS — Time series forecasting has always been a huge topic in statistics and machine learning in general. When we first learn it, we usually cover methods such as SARIMA and Holt-Winters exponential smoothing. Lately, the field has evolved and more advanced methods came up, such as long short-term memory (LSTM) neural…Time Series Forecasting6 min readTime Series Forecasting6 min read
Published in Level Up Coding·Jan 16Member-onlyThe Ultimate Python Learning Track for MLFollow this track and build a solid Python foundation for ML — I see many Python learning tracks for ML that are either too optimistic and make you believe that you will learn everything in 3 months, or that overcomplicate things and make you learn things you do not need. I designed a learning track that tries to find that sweet spot…Machine Learning9 min readMachine Learning9 min read
Published in DataDrivenInvestor·Jan 11Member-onlyWhy You’re Struggling to Break into Data ScienceAnd what you can do about it — I see many people having a hard time transitioning from other fields into Data Science, even though there’s more open jobs every day. Many companies end up going for people who already have domain experience or who are fresh out of college, with a degree in Statistics or Computer Science. …Data Science4 min readData Science4 min read
Published in DataDrivenInvestor·Jan 11Member-onlyHow I Made €22 000 in 2022 from Side HustlesWith detailed tips and ressources for you to use in 2023 — Straight to the point: besides my full-time data science job, I’ve had 5 sources of income in 2022, all related to teaching and writing. For each source, I’ll share here: how much I made from it how much effort I put into it what strategies I used to maximize my…Data Science5 min readData Science5 min read
Published in DataDrivenInvestor·Dec 15, 2022Member-onlyState of Data Science for 2023What changed in 2022 and what to expect for next year — In 2022 we have seen a lot of mixed signs regarding data science: many people saying the field was dying, while jaw-dropping AI was popping all over the internet (yes ChatGPT, I’m talking to you). …Data Science5 min readData Science5 min read
