Coffee and DataBy Marc-Olivier Arsenault

All writing / Topic

Data science

14 articles from the notebook.

  1. Data science 6 min read

    Dear DM

    A message for all the Decision Makers (DM) using data to make decisions.

  4. Data science 7 min read

    Warning systems on data warehouse

    The story of how and why I built Whistleblower, a system that allows us to set warnings on any table in our environment.

  7. Data science 4 min read

    Spark & AI Summit 2019

    My review of the latest Spark and AI Summit hosted in San Francisco on April 24th and 25th 2019.

  8. Data science 4 min read

    Spark JOIN using REGEX

    A more technical post about how I end up efficiently JOINING 2 datasets with REGEX using a custom UDF in SPARK

  9. Data science 4 min read

    The data science pyramid

    Let&8217;s not start with data science this time. Let&8217;s start with psychology. I am far from having any competence in this domain, but I remember in high school being…

  10. Data science 5 min read

    This is what I really do as a Data Scientist

    Data Science is getting very popular and many people are trying to jump into the bandwagon, and this is GREAT. But many assume that data science, machine learning, plug any…

  12. Data science 2 min read

    Distribution’s 5th Symphony

    I would like to share with you a small tool I have discovered this year which is very useful; Violin Plot!

  13. Data science 4 min read

    Data Science Development Environment (Part 1)

    Part of my task in the Data Science Team is to participate in the deployment of our development environment. This will be the first, of a series of articles about the…

  14. Data science 6 min read

    Kolmogorov–Smirnov test

    Lately, at work, we had to do a lot of unsupervised classification. We basically had to distinguish N classes from a sample population. We had a rough idea of how many classes…