header.tex

% Allowing for slides with 2 columns
\def\begincols{\begin{columns}[c]}
\def\endcols{\end{columns}}
\def\begincol{\begin{column}{0.5\textwidth}}
\def\endcol{\end{column}}



% Reducing black space between R code and output
% \setlength{\topsep}{0pt}{}
\setlength{\emergencystretch}{0em}
\setlength{\parskip}{2pt}
\setlength{\partopsep}{1pt}




%%% Reducing font size of R code and output
%%% code below from http://stackoverflow.com/a/38324868
%%% see also http://stackoverflow.com/a/39961605

% %% change fontsize of R code
% \let\oldShaded\Shaded
% \let\endoldShaded\endShaded
% \renewenvironment{Shaded}{\footnotesize\oldShaded}{\endoldShaded}
%
% %% change fontsize of output
% \let\oldverbatim\verbatim
% \let\endoldverbatim\endverbatim
% \renewenvironment{verbatim}{\footnotesize\oldverbatim}{\endoldverbatim}
% %%%


% code below taken from D. Eddelbuettel
% https://github.com/eddelbuettel/samples-rmarkdown-metropolis/blob/master/header.tex

%% If you have the Fira font installed, to actually have it used it
%% via rmarkdown you need to declare it here
% \setsansfont[ItalicFont={Fira Sans Light Italic},BoldFont={Fira Sans},BoldItalicFont={Fira Sans Italic}]{Fira Sans Light}
% \setmonofont[BoldFont={Fira Mono Medium}]{Fira Mono}
% FRS: but this seems not able to print equations well...

%% You can set various Metropolis options via \metroset{} here
%\metroset{....}

%% You can redefine colours, mostly by borrowing from Beamer
%\setbeamercolor{frametitle}{bg=blue}

%% You also use hyperref, and pick colors
\hypersetup{colorlinks,citecolor=blue,filecolor=blue,linkcolor=blue,urlcolor=blue}

%% when rendered with rmarkdown, somehow the unicode char for the dot
%% disappears so we redefine it here
%\renewcommand{\textbullet}{$\cdot$}
%\renewcommand{\itemBullet}{▸}   % unicode U+25b8 'black right pointing small triangle'

%% The institute macro puts a small line for affiliation at the bottom
%\institute{Institute of Institutionalism}

%% We can also place a logo
%\titlegraphic{\hfill\includegraphics[height=1cm]{someLogo.pdf}}