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TeXstudio
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[CTRL + T] 			Add comment symbol to line.
[CTRL + U]			Remove comment symbol from line.
[F1]				Render document.

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LaTeX
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% 				Comments line.
\				Next line.
\\				Next paragraph.

\textbf{}			Bold font. Normally used for vectors and matrices, if inside equations.
\texttt{}			Use typewriter (e.g., Courier, Inconsolata) font.

\cite{}				Introduces a bibliographic citation.
\eqref{}			Introduces a numeric reference to an equation.
\ref{table:label}		Introduces a numeric reference to a table.
\ref{fig:label}			Introduces a numeric reference to a figure.


$...$				One line equation. Embedded in text.
$$...$$				One line equation. Centered. Not numbered by default.
\being{equation}...		Multi-line equation. Centered. Each line is numbered by default. Use \label{eq:eq1} for reference.
\end{equation}
\begin{align}...		Multi-line equation. Centered. Each line is numbered by default. Use \label{eq:eq1} for reference.
\end{align}			Use '&' for aligment.

\fbox{}				Draw a box around the equation.
\begin{cases}...		Piecewise function. Use '\\' to separate each line. Use '&' for aligment. Requires the amsmath package.
\end{cases}
\begin{bmatrix}...		Vector/Matrix. Use '\\' to separate each line.
\end{bmatrix}

\text{}				Text format inside equation. Requires the use of the 'amsmath' package.
\mathbb{}			Uppercase Blackboard bold font. Used to denote special sets (e.g., natural numbers) or operations (e.g., expectation).
				Requires the asmfonts or asmsymb packages.
\mathcal{}			Uppercase Caligraphy font. Used to denote sets or Transforms (e.g., Laplace transform).


[]				Brackets.
\{\}				Curly brackets.
^{}				Superscript. Example: x^2.
_{}				Subscript. Example: x_2.
\hat{}				Hat notation. Normally used to denote mathematical estimations.
\dot{}				Dot notation. Normally used to denote system states in a state-space representation.
\bar{}				Bar notation. Normally used to denote mean value estimations.

\in				Set belonging. Example: x \in \mathbb{R}.
\cup				Set union.
\cap				Set intersection.

\approx				Approximately.
\sim				(~) sign. Used to denote a draw from a distribution.
\frac{}{}			Fraction. Example: \frac{1}{I}.
\sum\limits_{}^{}		Sigma notation to denote summation. Example: \sum\limits_{i=1}^{I}
\sqrt[n]{}			n-th root.
\underset{}{\text{arg}}		Argmin or argmax optimization.

\rule{7cm}{0.15mm}		Creates an underlined space.


\big\{ \Big\{ \bigg\{ \Bigg\{	Creates bigger parentheses, brackets and curly brackets in formulas.

\alpha, \Alpha, \beta, \Beta, \gamma, \Gamma, \pi, \Pi, \phi, \varphi, \Phi		Greek letters.


Document Types:

\documentclass[]{article}			Generic LaTeX article format. Use before {document} object.
\documentclass[11pt,journal]{IEEEtran}		IEEE Journal article format. Use before {document} object.
\documentclass[9pt]{memoir}			Generic LaTeX document format. Use before {document} object.
\documentclass[12pt,journal,landscape]{article}	Generic LaTeX article format in landscape mode for quick presentations. Use before {document} object and use \usepackage[]{geometry}.
\documentclass[11pt]{beamer}			Beamer presentation. Use \setbeamertemplate{caption}[numbered] for improving figure numbering caption, if necessary.
\documentclass[11pt,handout]{beamer}		Beamer presentation handouts. Use \usepackage{pgfpages}, \pgfpagesuselayout{2 on 1}[a4paper,border shrink=5mm], and \setbeamertemplate{caption}[numbered] for configuring handouts layout.

Libraries and Packages:

% IEEE recommendations
\usepackage[cmex10]{amsmath}
\interdisplaylinepenalty=2500
\usepackage{algpseudocode}
\usepackage{array}
\usepackage[caption=false,font=footnotesize]{subfig}
\usepackage{stfloats}
\usepackage{courier}
\usepackage{url}
\usepackage[]{mcode}

% correct bad hyphenation here
%\hyphenation{}

% Non-IEEE recommendations:
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{epstopdf}
\usepackage{fancyhdr}

% Additional packages. Don't know if these packages are recommended by IEEE
\usepackage{color}
\usepackage{cite}
\usepackage{footnote}
\usepackage{caption}				Must be used before the subfig package. Otherwise it presents an error. 
						Necessary for centering the caption of figures.

\usepackage{inconsolata}			%Inconsolata is similar to Windows Notepad's default font Consolas.
\usepackage[T1]{fontenc}

Document structure:

\pagestyle{fancy}
\fancyhf{}
\fancyhead[LE,RO]{}
\fancyhead[RE,LO]{}
\fancyfoot[CE,CO]{}
\fancyfoot[LE,RO]{\thepage}
\renewcommand{\headrulewidth}{2pt}
\renewcommand{\footrulewidth}{1pt}


\title{}			Use before {document} object.
\author{}			Use before {document} object. Example:
					\author{Juan Samuel P\'{e}rez\\
						Caniv-Tech, Inc.\\
						Albuquerque, NM, United States\\
						${\tt jsperez@caniv-tech.com}$\\
						}
\date{}				Use before {document} object.

\setlength{\parindent}{0pt}  			Removes indentation. Use before {document} object.

\renewcommand*\familydefault{\ttdefault}  	Sets the the base font of the document to be typewriter style (e.g., Courier, Inconsolata). Use before {document} object.
\renewcommand{\figurename}{Figura}		Renames the caption of the figures.

\begin{document}...
\end{document}

\maketitle					Inserts title and author. Use inside {document} object.
\onecolumn					Modifies formatting to a single column.

\begin{abstract}...		
\end{abstract}

\section{}			Starts a new section in the document.
\subsection{}			Starts a new subsection in the document.
\subsubsection{}		Starts a new subsubsection in the document.

\begin{enumerate}...		Numbered list. Use '\item' to create new number.
\end{enumerate}

\begin{itemize}...		Bulletpoints. Use '\item' to create new entry.
\end{itemize}

\bibliographystyle{IEEEtran}				Defines Bibliography style.		
\bibliography{IEEEabrv,literature_survey_v_1_0}		Inserts bibliography using abbreviations and .bib file.



Tables and Figures:

\begin{framed}			Puts a box around text. Requires the 'framed' package.
\end{framed}

\begin{table}[ht]...		Creates a float object with a table and specifies its location with reference to the page.
\end{table}			Use '\centering' for centering the table.
				Use '\caption{}' for title of the table.
				Use '\label{table:tab1}' for reference.
\begin{tabular}{l | c | r}...	Defines the columns and aligment of the contents of a table. Use inside {table} object.
\end{tabular}			Use '&' as vertical line separator.
				Use '\hline' as horizontal line separator.
				Use '\\' to separate each line.
				Use '\multicolumn{no_of_cols}{alignment}{value}' for merging horizontal cells.


\begin{figure}[ht]...		Creates a float object with a picture and specifies its location with reference to the page.
\end{figure}			Requires the 'graphicx' package.
				Use '\centering' for centering the table.
				Use \includegraphics[width=0.7\textwidth,trim = 0cm 0cm 0cm 0cm, clip=true]{picture.jpg}
				to specify the origin of the picture.
				Use '\caption{}' for caption of the picture.
				Use '\label{fig:fig0}' for reference.
				Use \subfloat[caption]{} for creating subfigures within a figure.
					Requires the 'subfig' package.
					Use \quad for better formatting if using subfigures.