\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{Niki (worlddoit)}
\pdfinfo{
  /Title (r-part3.pdf)
  /Creator (Cheatography)
  /Author (Niki (worlddoit))
  /Subject (r part3 Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{566BA3}
\definecolor{LightBackground}{HTML}{F4F5F9}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{r part3 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Niki (worlddoit)} via \textcolor{DarkBackground}{\uline{cheatography.com/170195/cs/35837/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Niki (worlddoit) \\
  \uline{cheatography.com/worlddoit} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 2nd December, 2022.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{3}

\begin{tabularx}{5.377cm}{x{1.34379 cm} x{3.63321 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Attributes 1}}  \tn
% Row 0
\SetRowColor{LightBackground}
`attr()` & to retrieve or set single attributes \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{`structure()`} & to set all the attributes in one shot \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{`attributes()`} & to list all the attributes in one shot \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{(**Basics)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Matrices 1}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`mat2\textless{}-matrix(c(1,2,3, TRUE, FALSE, FALSE),3,2)`\{\{noshy\}\} \newline % Row Count 2 (+ 2)
`typeof(mat2)`\{\{noshy\}\} \newline % Row Count 3 (+ 1)
`{[}1{]} "double"`\{\{noshy\}\} \newline % Row Count 4 (+ 1)
+ {\bf{Subsetting matrices}} \newline % Row Count 5 (+ 1)
The element in 1 row and 3column: `mat{[}1,3{]}` \newline % Row Count 6 (+ 1)
Extract the second row: `mat{[}2, {]}` \newline % Row Count 7 (+ 1)
Extract the second column: `mat{[} ,2{]}` \newline % Row Count 8 (+ 1)
Erase the second column: `mat{[},-2{]}` \newline % Row Count 9 (+ 1)
Select a subset: `mat{[}1:2,1:2{]}`% Row Count 10 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{(**Basics)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{3.08574 cm} x{1.89126 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Matrices 2}}  \tn
% Row 0
\SetRowColor{LightBackground}
`t(A)` & transposed \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`diag(A)`, `diag(c(.))` & diagonal \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`solve(.)` & inverse \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
`matrix(1:6,2,3)+\{\{nl\}\}matrix(6:1,2,3)` & sum \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`matrix(1:6,2,3)-\{\{nl\}\}matrix(6:1,2,3)` & substract \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
`matrix(1/(1:6),2,3)*\{\{nl\}\}matrix(1:6,2,3)` & product elem \tn 
% Row Count 9 (+ 2)
% Row 6
\SetRowColor{LightBackground}
`matrix(1/(1:6),2,3)\%*\%\{\{nl\}\}matrix(1:6,2,3)` & product \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
`crossprod(A,B)`\{\{noshy\}\} & cross-product \tn 
% Row Count 13 (+ 2)
% Row 8
\SetRowColor{LightBackground}
`outer(A,B)` & outer product \tn 
% Row Count 14 (+ 1)
% Row 9
\SetRowColor{white}
`rbind()` `cbind()` & bind by rows, by columns \tn 
% Row Count 16 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{(**Basics)(***Advanced)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Attributes 2}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{+ {\bf{Set two different attributes }} \newline % Row Count 1 (+ 1)
`x\textless{}-1:10` \newline % Row Count 2 (+ 1)
`attr(x,"att1") \textless{}- "AttV"`\{\{noshy\}\} \newline % Row Count 3 (+ 1)
`attr(x,"att2") \textless{}- 14`\{\{noshy\}\} \newline % Row Count 4 (+ 1)
+ {\bf{Same with `structure`:}} \newline % Row Count 5 (+ 1)
`x \textless{}- structure(1:10, att1 = "AttV", att2 = 14)`\{\{noshy\}\} \newline % Row Count 7 (+ 2)
+ {\bf{Names:}} \newline % Row Count 8 (+ 1)
`names(x) \textless{}- c(.)`\{\{noshy\}\} \newline % Row Count 9 (+ 1)
`setNames(.,c(.))`\{\{noshy\}\} \newline % Row Count 10 (+ 1)
+ {\bf{Unnames:}} \newline % Row Count 11 (+ 1)
`unname(x)`\{\{noshy\}\} \newline % Row Count 12 (+ 1)
`names(x)\textless{}-NULL`\{\{noshy\}\} \newline % Row Count 13 (+ 1)
+{\bf{Identical?}} \newline % Row Count 14 (+ 1)
`identitcal(mat1,mat2)`\{\{noshy\}\} \newline % Row Count 15 (+ 1)
+{\bf{Yes, not the SAME}} \newline % Row Count 16 (+ 1)
`lobstr::obj\_addr(mat1)`\{\{noshy\}\} \newline % Row Count 17 (+ 1)
 {\emph{{[}1{]} "0xf3107a0"}} \newline % Row Count 18 (+ 1)
 `lobstr::obj\_addr(mat2)`\{\{noshy\}\} \newline % Row Count 19 (+ 1)
{\emph{{[}1{]} "0xf310610"}}% Row Count 20 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{(**Basics)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Lists 1 - generic vector}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{(lis1 \textless{}- list(1:5, c("a","b"), \{\{noshy\}\} \newline  c(TRUE,FALSE,TRUE), 2.3))\{\{noshy\}\} \newline {[}{[}1{]}{]}\{\{noshy\}\} \newline {[}1{]} 1 2 3 4 5\{\{noshy\}\} \newline {[}{[}2{]}{]}\{\{noshy\}\} \newline {[}1{]} "a" "b"\{\{noshy\}\} \newline {[}{[}3{]}{]}\{\{noshy\}\} \newline {[}1{]}  TRUE FALSE TRUE\{\{noshy\}\} \newline {[}{[}4{]}{]} \{\{noshy\}\} \newline {[}1{]} 2.3\{\{noshy\}\}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{A list can contain lists.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Lists 2}}  \tn
% Row 0
\SetRowColor{LightBackground}
`typeof(lis1)`\{\{noshy\}\} & "list" \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`class(lis)`\{\{noshy\}\} & "list" \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
`attributes(lis1)`\{\{noshy\}\} & NULL \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
`is.object(lis1)`\{\{noshy\}\} & FALSE \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`is.list(lis1)`\{\{noshy\}\} & TRUE \tn 
% Row Count 10 (+ 2)
% Row 5
\SetRowColor{white}
`str(lis1)`\{\{noshy\}\} & `List of 4  \{\{nl\}\}\$ : int {[}1:5{]} 1 2 3 4 5  \{\{nl\}\}\$ : chr {[}1:2{]} "a" "b"  \{\{nl\}\}\$ : logi {[}1:3{]} TRUE FALSE TRUE  \{\{nl\}\}\$ : num 2.3`\{\{noshy\}\} \tn 
% Row Count 17 (+ 7)
% Row 6
\SetRowColor{LightBackground}
` lobstr:ref() `\{\{noshy\}\} & compare changes in the references \tn 
% Row Count 19 (+ 2)
% Row 7
\SetRowColor{white}
`unlist(lis1)`\{\{noshy\}\} & "1" "2" "3" "a" "b" "1" "2" "3" "4" \tn 
% Row Count 21 (+ 2)
% Row 8
\SetRowColor{LightBackground}
`list\_name{[}c(.){]}`\{\{noshy\}\} \{\{nl\}\}`list\_name{[}{[}.{]}{]}`\{\{noshy\}\}\{\{nl\}\}`list\$name` & Subset elements \tn 
% Row Count 25 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{(**Basics)(***Advanced)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Lists 3: Preallocation vs Empty}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{5.377cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/worlddoit_1669993780_ экрана 2022-12-02 в 16.08.29.png}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`vector("list",5) vs list()` \newline (***Advanced)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}