LaTeX frequent snippets

Math

Matrix:

\begin{bmatrix}
    x_{11} & x_{12} & x_{13} & \dots & x_{1n} \\
    x_{21} & x_{22} & x_{23} & \dots & x_{2n} \\
    x_{d1} & x_{d2} & x_{d3} & \dots & x_{dn} \\
\end{bmatrix}

Matrix bolding:

\mathbf

Transpose:

^\top

$\hat x, \tilde x, \overline x$:

\hat x, \tilde x, \overline x

Additional symbols:

List of LaTeX mathematical symbols - OeisWiki

Listing

\begin{itemize}
    \item 
\end{itemize}

\begin{enumerate}
    \item 
\end{enumerate}

\begin{lstlisting}[language=Python]

\end{lstlisting}

Table

\begin{table}[h]
	\centering
	\begin{tabular}{lcc}
		\toprule
		& & \\
		\midrule
		& & \\
		\bottomrule
	\end{tabular}
	\caption{<>}
	\label{tab:<>}
\end{table}

P.S. booktabs package needed.

Figure

\centering\includegraphics[width=\textwidth]{figures/}

\centering\animategraphics[loop, autoplay, every=1, width=\textwidth]{5}{figures/<folder>/<name>-}{0}{<end>}

P.S. Additional options: palindrome playback.

\begin{figure}[h]
	\centering
	\includegraphics[width=\linewidth]{figures/<>}
	\caption{<>}
	\label{fig:<>}
\end{figure}

P.S. graphicx package is needed.

\begin{figure}[h]
	\centering
	\begin{subfigure}{\linewidth}
		\includegraphics[width=\linewidth]{figures/<>}
		\caption{<>}
	\end{subfigure}
	\caption{<>}
	\label{fig:<>}
\end{figure}

P.S. graphicx and subcaption package is needed.

Bibliography

\usepackage[style=ieee]{biblatex}
\addbibresource{../../contents/biblio.bib}

Then inside the \begin{document} ... \end{document}:

% bibliography
\printbibliography

Beamer

Beamer - Overleaf, Online LaTeX Editor

Partition

\begin{frame}{}
    
\end{frame}

\begin{columns}
    \begin{column}{0.5\textwidth}
        
    \end{column}
    \begin{column}{0.5\textwidth}
        
    \end{column}
\end{columns}

\begin{block}{}
    
\end{block}

\begin{block}{}
    \begin{lstlisting}[language=Python]
        
    \end{lstlisting}
\end{block}

Visibility

In Beamers, the following commands can be used to control the visibility of the elements:

\only<>{}

\visbile<>{}

In itemize and enumerate environments, you don't need to manually write these commands for 1-by-1 roll out. Just use <+-> or <+>:

• Appears one by one:

\begin{itemize}[<+->]
  \item First
  \item Second
  \item Third
\end{itemize}

• Appears one by one with the previous one disappears:

\begin{itemize}[<+>]
  \item First
  \item Second
  \item Third
\end{itemize}

Tikz

Writing in Tikz could be painful if we don't follow a good structure/pattern. The most important principles are:

• Define the styles in a separate place and reuse them in the diagram.
• Use scope to group a series of related elements and give the scope a name, so that its position can be referenced like a node. For example, <scope>.center, <scope>.south, etc.
• Always align two elements relatively as long as possible, rather than hard coding their absolute positions.
  • Use chains for aligning a chain of nodes (within a scope or tikzpicture) to avoid specifying alignment direction & distance in every node.
  • Use calc for programmatically assign position to a node.
• Use \for loop and \newcommand to draw repeated elements.

Following these principles can make the Tikz diagram human-readable, maintainable, and, most importantly, elegant.

Include packages

\documentclass[10pt, border=5mm]{standalone}
\usepackage{amstext}  % for text in math mode
\usepackage[dvipsnames]{xcolor} % for color names
\usepackage{tikz}  % for drawing
\usepackage{pgf}  % for key=value style command variables
\usepackage{pgfplots}  % for plotting

\usetikzlibrary{
    chains,
    positioning,
    calc,
    fit,
    arrows.meta,
    shapes.geometric,
}

Define styles

\tikzset{
    basicnode/.style = {
        rectangle, rounded corners, minimum width=1.5cm, minimum height=0.5cm, text centered, align=center, draw=black, fill=blue!20
    },
    boundingbox/.style = {draw=black, dashed},
    inputnode/.style = {draw=black, rounded corners, dashed, align=center},
    postblc/.style = {basicnode, fill=yellow!20, minimum width=1cm},
    clsblc/.style = {basicnode, fill=lightgray, minimum width=1cm},
    connect/.style = {thick},
    arrow/.style = {connect, ->, >=stealth},
    joint/.style = {circle, thin, fill=lightgray, draw, minimum size=0.25cm, inner sep=0pt, outer sep=0pt, label=center:+},
}

Body

\begin{document} [node distance=0cm]
\begin{tikzpicture}

\end{tikzpicture}
\end{document}

Scope

\begin{scope} [local bounding box=<id>]
	...
\end{scope}

Alignment

Relative alignment

\node (<id>) [<style>, below=of <id>] {}
\node (<id>) [<style>, above=of <id>] {}
\node (<id>) [<style>, left=of <id>] {}
\node (<id>) [<style>, right=of <id>] {}

P.S. xshift & yshift for fine-grained adjustment.

P.S. Use label=<direction>:<text> to add label to a node. If multi-line is needed, use label=<direction>:{\parabox{<size>}{<text>}.

Chain

Chains - PGF/TikZ Manual

\begin{tikzpicture}[
    start chain=1 going right,
    start chain=2 going below,
    node distance=5mm,
    every node/.style=draw,
    every on chain/.style={join=by arrow},
    ]
  \node [on chain=1] {A};
  \node [on chain=1] {B};
  \node [on chain=1] {C};

  \node [on chain=2] at (0.5,-.5) {0};
  \node [on chain=2] {1};
  \node [on chain=2] {2};

  \node [on chain=1] {D};
\end{tikzpicture}

Calc

\node (A) at (0,0) {A};
\node (B) at ($(A) + (2,1)$) {B};
\node (C) at ($(C |- B)$) {D};  % (C_x, B_y)
\node (D) at ($(C -| B)$) {D};  % (C_y, B_x)

Fit

\node (<id>) [<style>, fit={(<id>) (<coord>) <...>}] {};

New command & for loop

\documentclass{article}
\usepackage{tikz}

\newcommand{\mycircle}[3]{
    \node[circle, draw, fill=#1, minimum size=1cm] at (#2, #3) {};
}

\begin{document}
\begin{tikzpicture}
    \foreach \x in {0, 1, 2, 3} {
    \foreach \y in {0, 1, 2} {
        \mycircle{blue}{\x}{\y};
    }
}
\end{tikzpicture}
\end{document}

.gitignore

# gitignore
.DS_Store
.idea/
log/

build/
*.aux
*.log
*.nav
*.out
*.snm
*.toc
*.synctex.gz
*.toc.vrb
*.vrb
*.bbl
*.bcf
*.run.xml
*.blg
*.pdf
*.sav
*.fdb_latexmk
*.fls

*.docx