This page lists tricks that I learned while using softwares.

Some of them are very tricky and worthy to be shared, that's why I made up this page.

Gnuplot

Gnuplot is "a portable command-line driven graphing utility for Linux".

This program is largely used to illustrate results in scientific papers.

Scalable output

Use SVG or PDF output to get figures that scale on papers, presentations, etc.

set term svg enhanced mouse size 600,400
set output 'default_plot.svg'

The option enhanced improves the text mode and mouse tells gnuplot to add mouse support for toggling plots (in a browser for example). You can also use another font, by adding something like font 'Verdana,9' to term option.

Attrative plots

Basic gnuplot output seems cheap, we have to admit it, but a set of a options can improve the rendering. In this example, we :

select another font,

set term svg enhanced mouse size 600,400 font 'Verdana,9' rounded solid

edit the style of axis and plots,

set style line 11 lc rgb '#808080' lt 1
set border 3 back ls 11
set tics nomirror

display a grid.

set style line 12 lc rgb '#808080' lt 3 lw 0.5
set grid back ls 12

Default output (script | data | svg)

Nice output (script | data | svg)

Dot/Graphviz

Pretty diagrams

Like Gnuplot, default output looks cheap. You can select another font and edit nodes and edges style.

node [color="#808080",labelfontcolor=blue,style="rounded",shape="box", fontname=Verdana];
edge [color="#004080"];

Default output (script)

Nice output (script)

UML using dot

You can directly use dot language to design UML (Frank Schoep website or Martin Elwin website). You can also use PlantUML, a tool that uses dot language.

Record structure

Dot language can be used to easily represent structures. It could be useful when illustrating network packets, tree structures, and so on. Use the following command to build the graph :

dot -Tsvg tree_struct.dot -o tree_struct.svg

Tree structure (data | svg)

Parse a JSON file with comments

I like to use JSON files with python. It's very simple to read and use such files. For example:

JSON file

{
    "username": "John Smith",
    "age": 42,
    "list": ["a", "b", "c"]
}

Python script

import json

with open('file.json') as f:
    d = json.load(f)
    print d['username']
    print d ...

Comment(s)

Compare two versions of a TeX file in a Git repository

When writting an article, you may want to get a diff of a TeX file to send it to your advisor, collaborators or reviewers. The tool latexdiff generates a diff of two TeX files but it does not manage inputs, includes or bibliography. Also, when you are using a RCS ...
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Converting two columns paper to ebook screen size

I recently bought a Kindle 4 and this device is simply wonderful. Reading an e-book is delightful and I recharged it only twice since I have it. One problem is reading two columns papers. It is just unreadable because too small on the kindle screen.

A solution consists in using ...
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Installing Sozi on Mac OS X

Update (March, 2013): Link to tdelahais guide (Mountain Lion up-to-date guide)

Update (done) (August 14th, 2012): I will clean up my system and reinstall Sozi in a few days in order to describre precisely all steps. I'll also clean up comments (but bugs and problems will be described in ...
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Geocaching, Geo-quoi ?!

Article rédigé pour le journal associatif Coin, de l'Association des Étudiants en Informatique de l'Université Lille 1

Géocaching - Chasse aux trésors grandeur nature

Dans cet article, je vous propose de dévouvrir le Géocaching, un moyen de renouer le lien avec un loisir d'antan : la chasse aux trésors ...
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Page 1 / 1

Damien Riquet

Short vitae

Other articles

Compile a flex/bison compiler using Scons

Parse a JSON file with comments

Compare two versions of a TeX file in a Git repository

Converting two columns paper to ebook screen size

Installing Sozi on Mac OS X

Geocaching, Geo-quoi ?!

Géocaching - Chasse aux trésors grandeur nature