Some features of numpy arrays

• Sometimes it is quicker to write a short bash script to 'get the job done' instead of doing it in python or something else
• bash comes with a load of very useful little programmes that allow you to modify files on the fly
• if you 'pipe' things together (with the …

• get it from here
• there are a number of great examples to get you started (the examples I showed in the seminar came from here)
• and further tutorials
• also check out the astropy-page on the WCS

What it can be used for (biased, certainly not complete list)

• reading+writing standard …

• I made some slides showing how to get started
• check out the jupyter website for docs and the like
• for further info on the jupyter extensions check out their github page
• feel free to download and play around with the notebook we worked on; (tarball contains both the notebook and …

• The slides I showed are in this rsync-cronjobs.pdf
• in a nutshell rsync is a fancy way to copy data
• instead of copying everything it will syncronise source and sinc by comparing time tags and/or sizes of files
• can be used like scp to sync different machines in a …

• The slides are in this gimp.pdf
• Also check out the notes on inkscape

What is it?

Wikipedia

(GNU Image Manipulation Program) is a free and open-source raster graphics editor used for image retouching and editing, free-form drawing, converting between different image formats, and more specialized tasks.

Gimp - what I …

• The slides are in this tmux.pdf
• if you know screen: tmux is a similar thing but I like it a lot more
• tmux vs screen cheat sheet

What is it?

Wikipedia

tmux is a software application that can be used to multiplex several virtual consoles, allowing a user to …

Lyx - document editor based on latex

Overview

• encourages writing based on the idea of what-you-see-is-what-you-mean WYSIWYM
• find it at Lyx
• the Documentation/Wiki is great
• allows you to write a LaTeX document without ever having to remember latex-commands

Features

• import of LaTeX files
• export of Lyx-files to LaTeX
• vast amount …

Using ssh and friends

• The slides are in this ssh.pdf

# we spoke about the following tools:
ssh          # utility to access remote machine
ssh-keygen   # used to generate key-pairs (to access machines without a password)
ssh-copy-id  # to copy the public key to the remote machine
scp          # 'secure copy', to copy files …

Welcome to Onsala Space Observatory's Tech Talk

• When: every other Wednesday 1.30-2.30 pm
• Where: Onsala Space Observatory, Conference Room on 2nd floor of Admin Building
• Contact: TechTalk mailing List

The idea for this is to be an informal meeting where we can discuss tools/software packages/programming languages …