Hey, I'm Tomi Mester. This is my data blog, where I give you a sneak peek into online data analysts' best practices. You will find articles and videos about data analysis, AB-testing, research, data science and more…
100% practical 6-week data science challenge & video course — simulating of being a junior data scientist at a true-to-life startup.
Learning SQL is very useful for anyone in the online world. And it’s a definite must for Data Analysts/Scientists! Here are 8 articles to start with…
I put together a ‘Python 3 for Data Science’ tutorial series starting from the very basics. It features 9 practical articles – that covers everything you need to know!
Read these 7 free articles about Bash/Command Line and take your very first step to learn the basics of coding for Data Science!
In this article, I want to quickly show you how websites collect data. It’s important to know this for two reasons: If you are a website visitor, it’s…
In this article, I’ll answer a question that frequently comes up in my online courses, which is: How do you upload a dataset (e.g. csv, txt or tsv…
When it comes to learning data science, there are many, many resources around the internet. Many articles, many online courses, many Youtube channels, and so on… You have…
Finding a data science mentor is tricky… Well, finding a mentor for any profession is tricky! You know, the best minds that you would love to learn from…
There are three popular languages for data scientists: SQL, Python and R. I create a lot of tutorials about SQL and Python on my blog… But I never…
I get way too many questions from aspiring data scientists regarding machine learning. Like what parts of machine learning they should learn more about to get a job….
I’ve talked a lot already about the three primary skills you need to know for data science: coding, statistics and business thinking… But it’s worth listing those secondary…
Is it important for data scientists to have domain knowledge in a specific field? In this article, I’ll answer this question. As you might have heard from me…
A question that I get often is this: “Should an aspiring data scientist learn more about big data (e.g. Apache Hadoop or Spark) to get a job?” I’ll…
In this article, I’ll answer a frequently asked question – which is: “What does a data scientist’s day look like?” This article is available in video and podcast…
Why are people losing at the casinos? Why shouldn’t you buy a lottery ticket? How do you account for uncertainty when you invest a smaller or bigger amount…
Tomi Gelo was one of the first participants in my 6-week data science course (the Junior Data Scientist’s First Month). Since then, he has done some pretty cool…
One of the most common questions I get from aspiring/junior data scientists is this: Is it possible to get freelance gigs and jobs as a junior data scientist?…
I’ve written about the importance of scripting in data science. But I’ve realized that I’ve never introduced my favorite script editor. It’s Sublime Text 3! In this article,…
Scatter plots are frequently used in data science and machine learning projects. In this pandas tutorial, I’ll show you two simple methods to plot one. Both solutions will…
Google Analytics is the most popular digital analytics tool in the world. Based on W3Techs market share report, Google Analytics is used by 84.1% of all websites for…
Plotting a histogram in Python is easier than you’d think! And in this article, I’ll show you how. I have a strong opinion about visualization in Python, which…
In this tutorial, you’ll learn how to run a Python script. And it’s quite essential. When working on data science projects, you’ll write Python code all the time……
Recently, I had the “pleasure” of setting up my work computer (the computer that I use exclusively for data science projects) from scratch. I have a 2016 Macbook…
Working with current dates and times in data science projects is quite common. In this episode of my SQL tutorial series I’ll show you the best functions that…