SQL: Get the count of related records
Micro tutorial: SQL select the count of related records and sort by it.
Posts by Category
Databases
FileMaker
Working with FileMaker data in Python
A lot of my clients have a substantial amount of their data in FileMaker databases. Analyzing that data or running machine learning algorithms on it is often...
Micro Tutorial
SQL: Get the count of related records
Micro tutorial: SQL select the count of related records and sort by it.
Pandas: Select rows that match a string
Micro tutorial: select rows of a Pandas DataFrame that match a (partial) string.
Miscellaneous
LaTeX mathematics cheat sheet
LaTeX is the de facto standard typesetting system for scientific writing. Find a a cheat sheet with the most frequent used mathematics commands here.
Python
Running Flask on macOS with mod_wsgi/wsgi-express
Tutorial on setting up your Flask application to run on macOS with WSGI
Pandas: Select rows that match a string
Micro tutorial: select rows of a Pandas DataFrame that match a (partial) string.
Comparing two Excel columns with Pandas and Numpy
Having been asked multiple times if I can quickly compare two numeric columns from an excel file, I set up a small Jupyter notebook (and an R script) to show...
Display inline images in a Jupyter notebook with Matplotlib
Today I was working with the MNIST handwritten digits data and wanted to display a few images in a Jupyter notebook. After looking at PIL, then Pillow, I fou...
Debugging Jupyter notebooks
While searching for ways to debug code in a Jupyter notebook, I found a lot of outdated posts. So I decided to quickly write up my findings.
Resolving import issues when deploying Python code to AWS Lambda
AWS Lambda is Amazon’s “serverless” compute platform that basically lets you run code without thinking (too much) of servers. I used Lambda in the past, thou...
Indexing: A few handy ways to access NumPy arrays
The following code snippets should serve as an (incomplete) cheat sheet for accessing NumPy arrays. All examples expect an import numpy as np.
Working with FileMaker data in Python
A lot of my clients have a substantial amount of their data in FileMaker databases. Analyzing that data or running machine learning algorithms on it is often...
R Stats
Comparing two Excel columns with Pandas and Numpy
Having been asked multiple times if I can quickly compare two numeric columns from an excel file, I set up a small Jupyter notebook (and an R script) to show...
Systems
Running Flask on macOS with mod_wsgi/wsgi-express
Tutorial on setting up your Flask application to run on macOS with WSGI
Sharing a VPN connection with another device on macOS Sierra/El Capitan
There are multiple reasons why you would want to share a VPN connection from your Mac with another device. Maybe you have to install a proprietary VPN client...