LATEX for Methodologists

Lecture 1: Introducton

Sacha Epskamp

University of Amsterdam
Department of Psychological Methods

02/04/2013
Contact Details

Course website:
I http://sachaepskamp.com/latex-course
E-mail:
I sacha.epskamp@gmail.com
Introduction

I LAT
EX is a completely different way of writing assignments,
papers, articles and even presentation slides and books
I This course is a brief introduction to using LATEX for
creating scientific documents
I It is specifically aimed at psychological researchers and
methodologists
I Relatively little focus on mathematical formulae
I APA style documents
I Incorperating statistical anayses with R and
Sweave/knitr
Course Outline

April 2: Introduction
April 10: Basics of writing in LATEX
April 16: Writing APA style articles
April 23: Advanced topics
Course Outline

April 2: Introduction
I What is LAT X?
E
I Why use LAT X?
E
I How to obtain a LAT X distribution?
E
I How to obtain a LAT X editor?
E
I General outline of a LAT X document
E
April 10: Basics of writing in LATEX
April 16: Writing APA style articles
April 23: Advanced topics
Course Outline

April 2: Introduction
April 10: Basics of writing in LATEX
I Document Structure
I Sectioning
I Writing text
I Environments
I Special text
I Mathematical formulae

April 16: Writing APA style articles

April 23: Advanced topics
Course Outline

April 2: Introduction
April 10: Basics of writing in LATEX
April 16: Writing APA style articles
I The apa document class
I Header information
I Writing the body
I Citations using BibT X and apacite
E
April 23: Advanced topics
Course Outline

April 2: Introduction
April 10: Basics of writing in LATEX
April 16: Writing APA style articles
April 23: Advanced topics
I Incorperating statistics using R and
Sweave/knitr
I Making presentation slides with beamer
Today’s lecture

Introduction

What is LATEX?
History of LATEX

Why use LATEX?

LATEX vs WYSIWYG

Obtaining LATEX

Making a first LATEX document

Hello world example
What is LATEX?

LATEX is. . .
I A program that takes a plain text file with codes as input
and produces a output document
I This process is usually called compiling
I The input is a plain text file with .tex extension
I The output is a multipage vector based image file. In the
past this was .DVI but nowadays mostly pdf and
postscript are used
I We will use .pdf, which can be created with the pdfLATEX
program
I The programming language in which the input file is written
What is LATEX?

LATEX refers to the programming language used to write the

input file and the program used to interpret this file and compile
the output file. It does not refer to an editor in which you write
the input file.
What is LATEX?

Simple representation:

.tex / pdfLAT X / .pdf

E


other files
What is LATEX?

More advanced representation including Sweave and citations.

.Rnw / Sweave / .tex / pdfLAT X / .pdf

; 5 J E

 
data figures other files
J

.bib / BIBT X
E
What is LATEX?

For now, only consider:

.tex / pdfLAT X / .pdf

E


other files
History of TEX

I In 1969, computer scientist Donald Knuth published the

book “The Art of Computer Programming”. It was typeset
using 19th century techniques.
I 8 years later, in 1977, Knuth received proofs of the second
edition. By this time the typesetting technology were
largely replaced photography and he found the proofs awful
I With computers on the rise, Knuth saw a future in digital
typesetting and decided that a long term stable system for
digital typesetting was needed.
I This lead Knuth to devellop TEX
TEX

I TEX is a low-level markup and programming language

(because it has if-else statements)
I Its name comes from the greek word τ χνoλoγια
(technologìa), which translates to “technology”.
I TEX is meant to be very stable, so that it is a platform that
produces the same documents for many years.
I Its current version is 3.1415926. Future version numbering
will asymptotically approach π
TEX

Donald Knuth on the future of TEX:

absolutely final change (to be made after my death),
will be to change the version number to π, at which
point all remaining bugs will become features.
History of LATEX

I TEX is a very low-level language, meaning you have to

specify many settings to control the way your document
looks
I In the early 1980s, Leslie Lamport wrote a system of
macros to automate most things of TEX, this resulted in
LATEX
I LAT
EX is based on the idea that authors should be able to
focus on the content of what they are writing without being
distracted by its visual presentation
I The current version of LATEX is LATEX 2ε , a new version is
being developed for over 20 years now
LATEX now

I Almost all use of TEX is through LATEX.

I LAT
EX is free as in “free speech“ an free beer
I LATEX is used especially by many researchers as main
method of producing documents
I There is a large active and supportive community behind
LATEX that produce many packages for extending LATEX
I There is an abundance of good software for editing LATEX
files
WYSIWYG programs

I LAT
EX is completely different from What You See Is What
You Get programs (WYSIWYG) you are used to
I For example:
I Microsoft Word
I Openoffice.org
I LibreOffice
I The main difference between the the two is that in
WYSIWYG programs you directly edit the output file while
with LATEX you edit the input file
Disadvantages of LaTeX vs. WYSIWYG

I LAT
EX comes with a different learning curve. Anyone can
write something in WYSIWYG programs, while it takes
some time to even produce basic documents in LATEX
I It can be hard to see what the document will look like
I You need to know a lot of commands to use LATEX (but, as
we will see later, LATEX editors greatly reduce this)
I It can be harder to make very specific changes in LATEX
I LAT
EX can be very frustrating when it is not clear why your
document does not look the way you want it to look
I Collaboration on LATEX documents is harder, but Google
comes to the rescue
Advantages of LATEX vs. WYSIWYG
I In LATEX your documents will look very professional with
minimal effort
I Produce your documents in PDF
I Your audience reads your document in a lightweight reader
instead of an editor
I Your documents do not require special software to view
I Your documents will always look the same
I Your files are all in plain text. No binary documents that
can break causing you to lose what you have written
I You do not have to spend time on specifying the layout,
placing the figures, writing the reference list and making
sure the fonts are all correct
I Mathematical formulae can easily be included.
I Your document is very flexible. Need to add a figure? All
references to later figures are automatically corrected!
Ambiguities in LATEX vs. WYSIWYG

I LAT
EX forces you to properly section your article
I Some journals require LATEX format, and others do not
accept LATEX format
I LAT
EX takes a long time to learn
I While you can do marvelous things with WYSIWYG
editors, this takes even longer to learn and is usually not
wanted in scientific reports
Obtaining LATEX

To use LATEX you need three things:

I A plain text editor
I A LATEX distribution
I A program to view PDF files
I Adobe Reader
LATEX editors

I A LATEX distribution supplies you with the programs needed

to compile LATEX documents
I But you also need an editor to write these documents
I As is the same with all programming languages, LATEX
documents are written in plain text
I Because of this, any plain text editor can be used
I Editors come in all sorts of sizes with highly different levels
of complexity. In general the complexer an editor the more
you can do with it
I Which editor is the best is a highly debated subject!
A good editor for LATEX has syntax highlighting, bracket
matching, included log output and shortcuts for compiling and
viewing your document
plain text editors
Typically a programmer wants to use a single editor for all
languages. These so called plain text editors can differ strongly.
Some examples of such editors that can be used for LATEX
Notepad++ A very nice and clean editor for Windows. Very
lightweight, not much functionality besides writing
code
Gedit The default text editor for Linux. Very lightweight
and can be extended with many plugins
Emacs The editor of choice for many programmers. Very
hard to learn but very useful in the end. Is an IDE
for many programming languages. Some consider
it to be an operating system
Vim Another editor of choice of many programmers
Even if you don’t use it for LATEX, you want a good plain text
editor!
LATEX editors

Other editors are specialized for LATEX:

Rstudio If you did not use this IDE yet for R then do so.
Has especially good support for Sweave and
knitr
TEXniccenter Has a menu very similar to WYSIWYG editors
with shortcuts for common pieces of codes
TEXmaker Similar to TeXniccenter with less functionality but
cross platform
TEXworks A very basic LATEX editor which does what you
want it to do and not much else. Comes default
with most distributions
Which editor to use?

Depends on your needs, writing style and preferences

Need to write? Use:

Short note, abstract, outline, any text Don’t use LATEX, use a good lightweight
that does not need formatting plain text editor (notepad++, Gedit,
etcetera.)
A lot of text while New to LATEX and Use TEXnicCenter or TEXmaker
used to WYSIWYG editors
Text in which R code is included or run Use RStudio or Emacs (with knitr)
in the background package)
LATEX texts often and programming in Learn a powerfull editor such as
multiple languages Emacs
TEXworks

In this course we will be using TEXworks because it is very

basic and comes default with MiKTEX and MacTEX and is
available for Linux as well.
Important to note is that TEXworks is not the only choice.
Indeed it isn’t even metioned on the previous slide.
LATEX distributions

I LAT
EX is distributed through distributions
I A good distribution has a package manager that allows you
go install and update packages with relative ease
I In this course we will be using:
Windows: MikTEX
Mac: MacTEX
Linux: TEXlive
Detailed instructions to install these distributions can be found
on the course website.
PATH variable

I The instruction guide will ask you to set something called a

PATH variable
I This is a small list of paths to directories that tells your
computer where it can find programs
I This enables you to run pdfLATEX from commandline
I In some editors, this is the only way to make a shortcut to
LATEX
I Might not be needed now but useful to have set right
lateron
A first LATEX document

Open TEXworks, make a file with the following code:

\documentclass{article}
\begin{document}
Hello World!
\end{document}

Save this file in an empty folder. Then select “pdfLaTeX” from

the drop down menu and press the play button.
Templates

I Often it can be hard to start from scratch

I Many templates exist to help you get started, find them on
Google!
I Often in these comments are used to say what you need to
do
I A comment is preceded by a % sign
Tips

Learning LATEX can take a while, and even after that you often
encounter problems with compiling. Here are some tips to help
when you get stuck:
I Compile your document often!
I Comments are a very useful debugging tool
I Use line numbering in your editor. the output of pdfLATEX
will mention the line number where things went wrong
I Use templates
I Really stuck? Try to identify the problem look online:
I http://google.com/
I http://tex.stackexchange.com/
For next week, try the following:
I Install a LATEX distribution for your operating system using
the instructions in the instructions on my website
I Install TEXworks
I Try to compile the hello world template aboce
I Try some templates. What works? What errors do you get
if it doesn’t?