Simple CSV file import You have a CSV file called “data.csv”. It has a header line, and is delimited using “;”. You want to import it into Postgres and a table called “your_table”: Create the database table. Set column-types so…
I was drinking a bootle of water, while listening to a group of people having a debate. As the water level sunk, I noticed something. In the beginning the bottle would resonate/vibrate when the people with higher pitch voices talked.…
Note: The word “easy” is relative to the other solutions I found for doing 3D graphics in LaTeX. The following template is adapted from the annotated 3d box example. % Template for drawing with tikz 3D package \documentclass[]{article} \usepackage{tikz} \usetikzlibrary{3d}…
I’m in the process of doing research for my computer science ph.d. project. Like many others, I’m using Google Scholar to find interesting papers for my research. Some papers are available through ACM and some through IEEE.
Assuming a shapefile called myshapefile.shp, a table mytable in schema xyz, in a PostGIS enabled database called mydb on localhost. The table is owned by user dbuser who has password “secret”. Using shp2pgsql shp2pgsql myshapefile -I xyz.mytable > statements.sql psql…
tikZ and LaTeX PGF/TikZ is a tandem of languages for producing vector graphics from a geometric/algebraic description. You can use this language inside tex files, to programmatically draw nice 2D and 3D graphics. Another package which some people prefer for…
Download sourcecode Choose the appropriate sourcecode version by going to wget # or use curl
Nagios looks at 1) return codes and 2) output to stdout. This is the hello world of Nagios plugins, written in Python: check_helloworld.py: #!/usr/bin/env python # optparse is Python 2.3 – 2.6, deprecated in 2.7 # For 2.7+ use …
In terminal you can write something like: say ‘hello world’ Which will make your computer talk. To save the audio output to a file, use the -o option. A full example is: say -o hello.aiff -v ‘Alex’ ‘Hello, my name…
My top seems to act a little strange (running Snow Leopard). It doesn’t respond to the key commands I’m used to, e.g. for sorting on Memory Usage etc. Nevertheless, this is how I found out (by chance really) how to…