latex

# To insert a table of contents
A table of contents (ToC) is produced by inserting \tableofcontents at the appropriate place in your document.

# To get a partial derivative in latex
\partial

# symbols
# angstrom in text mode
\AA

# To insert a close enough degree symbol in latex
$^{\circ}$

# math symbols
\mp for +-
\equiv for equivalent

# tilde
\sim

# infinity
\infty

# square root
\sqrt{things under root}

# not equal
\neq

# plus or minu
\pm

# hat or cap
\hat{a}

# arcsec
\arcsec # this comes from some package

# in math mode you can just use '' and this will translate to the arcsec symbol

# latex transpose
\mathbf{A}^T 

# norm
|| x ||

# elbow symbol for logical negation
\neg

# set intersection symbol
\cap

# Correct way when running biber
pdflatex test
biber test
pdflatex test

# For your compilation to work properly, you should compile in the following manner:
pdflatex file.tex && bibtex file.aux && pdflatex file.tex && pdflatex file.tex

# generate fake text with the blindtext package
\blindtext

# define a path for images
\graphicspath{ {./images/} }

# To avoid numbering sections  but make them appear in toc
\setcounter{secnumdepth}{0}

# link style set up
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
    filecolor=magenta,
    urlcolor=cyan,
}

# squiggly underline
\usepackage[normalem]{ulem} % [normalem] to set \emph{} to default behaviour (italic instead of underlining)
...
\uwave{to be underlined in a squiggly way}

# spacing
\usepackage{setspace}
\onehalfspacing

# changing fonts
{\tt This will be in a "typewriter font"}

# add space after line breaks
\\[3cm]

# insert photo in a resume
\begin{tikzpicture}[remember picture, overlay]
  \node [anchor=north east, inner sep=0pt]  at (current page.north east)
     {\includegraphics[height=3cm]{example-image}};
\end{tikzpicture}

# suppress page numbering
\thispagestyle{empty}

# insert tabular
\begin{tabular}{lr}
a & b \\
c & d \\
\end{tabular}

# inserting degree symbol
# The \degree command is provided by the gensymb package
\usepackage{gensymb}

# create outline or bookmarks automatically
\usepackage[bookmarks]{hyperref}

# break urls
\usepackage[breaklinks=true]{hyperref}

# using natbib package
# cite within paranthesis
\citep

# use natbib to cite only author
\citeauthor

# in text citations
\citet
# including images
# relative path of images should be relative to the main .tex file

# cross referencing when using external files
\usepackage{xr}
% In your preamble

\myexternaldocument{File2}

# referencing a section
Use \label{} next to a section and then \ref{} to create the reference.

# display a wide figure in a two column document
\begin{figure*}

# for \toprule \midrule etc
\usepackage{booktabs}

# blank to fill in latex
\rule{1cm}{0.5mm}

# color text differently
# requires the xcolor package
\textcolor{red}{what ever}

# enclosing paranthesis
\left(   \right)
\left[ \right]

# underline a character
\underline{u}

# add a footnote
\footnote{text for footnote}

# insert image as grid
\begin{figure}
\begin{tabular}{cc}
  \includegraphics[width=65mm]{it} &   \includegraphics[width=65mm]{it} \\
(a) first & (b) second \\[6pt]
 \includegraphics[width=65mm]{it} &   \includegraphics[width=65mm]{it} \\
(c) third & (d) fourth \\[6pt]
\multicolumn{2}{c}{\includegraphics[width=65mm]{it} }\\
\multicolumn{2}{c}{(e) fifth}
\end{tabular}
\end{figure}

# resize table width
\resizebox{\columnwidth}{!}{%
\begin{tabular}{r|lll}
\multicolumn{1}{r}{}
& \multicolumn{1}{l}{Heading 1}
& \multicolumn{1}{l}{Heading 2}
& \multicolumn{1}{l}{Heading 3} \\ \cline{2-4}
Row 1 & Cell 1,1 & Cell 1,2 & Cell 1,3 \\
Row 2 & Cell 2,1 & Cell 2,2 & Cell 2,3
\end{tabular}%
}

# include cpp
C\texttt{++}

# put citation inside caption
\protect \cite{citekey}

# cannot find reference error can occur if \label comes before \caption in figure environment

# combined multiple input files to single latex file
latexpand main.tex > combined.tex

# keep comment
latexpand --keep-comments main.tex

# bibliography
\begin{thebibliography}{9}  % Replace "9" with the maximum number of digits in your citations

\bibitem{chollet2018}
Chollet, François. \emph{Deep Learning with Python}. Shelter Island, New York: Manning Publications Co, 2018.

% Add more \bibitem entries if needed

\end{thebibliography}

When you compile your document, the \cite command in the text will generate a citation number within square brackets, and the bibliography section will display the manually entered bibliography entries.

Note that this approach requires you to manually maintain the bibliography entries within the LaTeX document. If you have a large number of references or plan to reuse them in multiple documents, using a separate .bib file with BibTeX is generally more convenient.

# multi line comments in overleaf
ctrl + /

# insert text into equation
\textrm{your text here}

# convert tex to epub
# use fixed width for images to render well in epub output
tex4ebook main.tex

# Use pdflatex without interactive prompts
-interaction=nonstopmode

# Mark the differences between two pdf versions on the updated pdf using 
# the corresponding tex files
# https://www.overleaf.com/learn/latex/Articles/Using_Latexdiff_For_Marking_Changes_To_Tex_Documents
latexdiff old_version.tex new_version.tex > diff.tex
pdflatex diff.tex
bibtex diff.aux

# To not have lines broken in the diff
latexdiff -t CFONT

# Only Highlight additions in bold
latexdiff -t BOLD last_read.tex main.tex > diff.tex

# table environment
\begin{table}
\end{table}

# Using bib file for creating references
\documentclass{article}
\begin{document}
This is a citation example \cite{einstein1905}.

\bibliographystyle{plain} % Choose a bibliography style
\bibliography{mybibfile}  % Name of your .bib file
\end{document}

# citing online resources with bibtex
@misc{winnt,
  title = {{ms windows nt} kernel description},
  howpublished = {\url{http://web.archive.org/web/20080207010024/http://www.808multimedia.com/winnt/kernel.htm}},
  note = {accessed: 2010-09-30}
}

# To keep First Name and Surname as single unit in citation
@book{citekey,
author = {{FirstName LastName}},
} 

# If you use \bibitem way of including references, the sequence of 4 commands, pdflatex -> bibtex -> pdflatex etc is not needed.
# To generate \bibitem eventhough you are use a bib file and bibtex after running bibtex copy the contents of the .bbl file

# Use natbib
\usepackage{natbib}
\bibliographystyle{unsrtnat}

# Renew name of bibliography  
\renewcommand\bibname{Reference}

\printbibliography[title={Reference}] # Using biblatex


# number items in bibliography
\usepackage[numbers]{natbib}

# cite multiple references
\cite{citation01,citation02,citation03,citation04,citation05}

# for code
\begin{verbatim}
\end{verbatim}

# insert urls 
\href{/path/to/link}{display text}

# make a citation like this (DR7; Abazajian et al. 2009)
\citep[DR7;][]{abazajian_seventh_2009}

# basic bibliography
\usepackage{natbib}
\begin{document}
...
\bibliography{zotero.bib}
\bibliographystyle{plain}
\end{document}

# combine figures and tables using subfigure
\usepackage{caption}
\usepackage{subcaption}

The width specified for each subfigure should add upto the textwidth
in each include figure specify width as \textwidth but it will be what you
specified in the subfigure line instead of original \textwidth

    \begin{figure}[htb]
    \centering
\begin{subfigure}{0.48\linewidth}
\includegraphics[width=\linewidth]{Figures/Linear regression/LinearReg_Fib}
\caption{}
\end{subfigure}
    \hfill
\begin{subfigure}{0.48\linewidth}
\includegraphics[width=\linewidth]{Figures/Linear regression/LinearReg_RBC"}
\caption{}
\end{subfigure}

\medskip
\begin{subfigure}{0.48\linewidth}
\includegraphics[width=\linewidth]{Figures/Linear regression/LinearReg_Leuko"}
\caption{}
\end{subfigure}
    \hfill
\begin{subfigure}{0.459\linewidth}
    \centering
    \sisetup{group-four-digits}
\begin{tabular}{l S[table-format=4.1]S[table-format=-3.2] }
    \toprule
        & C10       & C01       \\
    \midrule
F/P low & 240.1     & 171.3     \\
F/P     & 763.5     & 269.08    \\
F/P mo  & 1201.0    & 190.6     \\
F/P h   & 6651.6    & -345.9    \\
    \bottomrule
\end{tabular}
\end{subfigure}
    \caption{Linear regression model between sample stiffness (determined as the tangent modulus at 75\%) and (a) Fibrin/platelet content, (b) Red blood cells and (c) Leukocytes}
\label{fig:LinearRegression}
    \end{figure}

#Clean up (remove) all regeneratable files generated by latex and bibtex or biber. This is the same as the -c option with the addition of dvi, postscript and pdf files, and those specified in the $clean_full_ext configuration variable. 
latexmk -C main.tex

# remove comments from document
# https://tex.stackexchange.com/questions/83663/utility-to-strip-comments-from-latex-source
# NOTE that this also makes a single file out of all includes
latexpand --empty-comments mytexfile.tex > mytexfile-stripped.tex

# remove lines with only % and whitespace
sed -i '/^\s*%/d' mytexfile-stripped.tex

# to provide a shorter chapter title that appears in the header
\chapter[<short title>]{<long title>}

# insert equations
\usepackage{amsmath}

\begin{gather} # without alignment on equals
eqn \\
eqn 2
\end{gather}

\begin{align} # align on equals
a &= b
c &= d
\end{align}

# count words appearing in pdf from tex file
texcount filename.tex

# brackets
\left(
\right)

# use trim to crop a figure
\includegraphics[trim={1cm 10cm 1cm 2cm }, clip, width=\textwidth]{figure.pdf}

# place output file in separate directory
pdflatex -output-directory=target <file>

# minimal code need for bibliography using bibtex
\bibliographystyle{plain} % We choose the "plain" reference style
\bibliography{refs} % Entries are in the refs.bib file

# pound symbol in \url is unsupported escape it to avoid errors
 
# stylised l
$\ell$

# script version of captial letters
\mathcal{A}

# wrap long lines by defining fixed width for columns
\begin{tabular}{|p{5cm}|c|c|}

# right margin
\usepackage[right=3cm]{geometry}

# disable todos from todonotes package
\usepackage[disable]{todonotes}

# remove empty pages after a chapter in book
\documentclass[openany]{book}

# quick verbatim text
\verb|text with special characters \ { }|

# insert text within align environment
\intertext

# break long urls
\usepackage[hyphens]{url}

# foldable block
\documentclass[a4paper]{minimal}
\usepackage{ocgx}
\begin{document}
Max Mustermann \switchocg{ocg1}{\fcolorbox{blue}{red}{\bfseries +}}\begin{ocg}{OCG 1}{ocg1}{0}
  \colorbox{yellow}{ \parbox{5cm}{Max Mustermann\\Musterweg 1\\12345 Musterstadt}}
\end{ocg}

Erika Mustermann
\end{document}

# code with line breaks
# Using a monospaced font for the listing fixes most of the copy-paste issues
\usepackage{listings}

\lstset{
  breaklines=true, % Prevents breaking lines
  basicstyle=\ttfamily % Uses monospaced font
}

\begin{lstlisting}
...
\end{lstlisting}

#
# add to contents or toc
\listoftodos
\addcontentsline{toc}{chapter}{List of Todos}

# strikeout or strikethrough
\usepackage[normalem]{ulem}
\sout{Hello World}

# simple table
\begin{tabular}{|c|c|c|}
item1 & item2 & item3 \\
item4 & item5 & item6
\end{tabular}

# less than and greater than
\le
\ge

# prime or dash for first derivative
\prime

# double prime for double derivative
a^{\prime\prime}

# automatic numbering of rows in table
https://tex.stackexchange.com/questions/21243/automatic-table-row-numbers