In this article we will look into the best way to store time-based data and use it with gnuplot.
The first thing to realize is that we should specify a timezone when specifying dates and times (“datetimes”). To prevent calculations, I tend to use datetimes in UTC.
Next …
Cut facebook out of your life altogether.
For me, the first step is easy: I don’t use facebook, and never have. :-)
Here is a guide to delete your facebook account properly.
Serveral useful recipes for manipulation video with ffmpeg.
Note that a name within angle brancket (like <this>) represents a generic input or output file.
The following recipe extracts the audio from a video file and converts it to WAV format.
ffmpeg -y -hide_banner -i <input> -vn -c …We can use PostScript’s Endpage procedure to e.g. add a signature to each page of a PDF file, using only ghostscript.
In contrast to the earlier article using TeX, this method is suitable for a small annotation that is identical for every page.
This definition of EndPage will …
After some initial experiments with sqlite as a replacement for a json data file format (which I did not pursue in the end), I have now started using sqlite in earnest. And I must say that I quite like it.
At $work, we still have to submit written time sheets …
This document explores how an SQLite database could be used to store data for the resin-calculator. Normally, the recipes are a dictionary keyed to the name of the resin. The value of each recipe is a list of (component, parts-by-weight) tuples. Since a database only contains tables, where each row …
Before the rise of git, I used rcs as my version control system. Because I want to standardize on git, I am slowly converting old repositories.
In this article I’ll be converting my old perl scripts in ~/src/perl.
From the existing repo, we create …
As an engineer I do a lot of calculations. These can be done with pen and paper and a calculator, in an IPython notebook or in a throwaway spreadsheet. All of these methods have shortcomings, though.
Pen and paper is hard to share and (in my case) hard for others …