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…Category: Coding In Data Science and Analytics Page 1 of 3
As a data scientist or data analyst, sooner or later you’ll come to a point where you have to collect large amounts of data. Be it a hobby…
James Rice was a participant in my 6-week data science course (The Junior Data Scientist’s First Month). After finishing the course, he started a cool hobby project and…
Tamas Ujhelyi was a participant in my 6-week data science course (the Junior Data Scientist’s First Month). After finishing the course, he started a cool hobby project and…
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…
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…
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…
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……
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…
In this episode of the SQL tutorial series you’ll learn two simple but important commands that you’ll use frequently when working in SQL: TRUNCATE TABLE and DROP TABLE….
This is the second episode of my web scraping tutorial series. In the first episode, I showed you how you can get and clean the data from one…
Running hobby projects is the best way to practice data science before getting your first job. And one of the best ways to get real data for a…
Over the last 6 years I’ve been part of many job interviews – on both sides of the table. The most fun, but also the most feared, part…
100% practical 6-week data science challenge & video course — simulating of being a junior data scientist at a true-to-life startup.
This is the third episode of my pandas tutorial series. In this one I’ll show you four data formatting methods that you might use a lot in data…
Let’s continue with the pandas tutorial series. This is the second episode, where I’ll introduce aggregation (such as min, max, sum, count, etc.) and grouping. Both are very…
Pandas is one of the most popular Python libraries for Data Science and Analytics. I like to say it’s the “SQL of Python.” Why? Because pandas helps you…
Did you know that Python wasn’t originally built for Data Science? And yet today it’s one of the best languages for statistics, machine learning, and predictive analytics as…