\usepackage{Sweave}
\usepackage[usenames,dvipsnames]{color}
\usepackage{graphics}
\usepackage{latexsym, amsmath, amssymb}
\usepackage{authblk}
\usepackage[colorlinks=true, linkcolor=Blue, urlcolor=Blue,
  citecolor=Blue]{hyperref}

%% Simple macros

\newcommand{\code}[1]{{\texttt{#1}}}
\newcommand{\file}[1]{{\texttt{#1}}}

\newcommand{\software}[1]{\textsl{#1}}
\newcommand\R{\textsl{R}}
\newcommand\Bioconductor{\textsl{Bioconductor}}
\newcommand\Rpackage[1]{{\textsl{#1}\index{#1 (package)}}}
\newcommand\Biocpkg[1]{%
  {\href{http://bioconductor.org/packages/release/bioc/html/#1.html}%
    {\textsl{#1}}}%
  \index{#1 (package)}}
\newcommand\Rpkg[1]{%
  {\href{http://cran.fhcrc.org/web/packages/#1/index.html}%
    {\textsl{#1}}}%
  \index{#1 (package)}}
\newcommand\Biocdatapkg[1]{%
  {\href{http://bioconductor.org/packages/release/data/experiment/html/#1.html}%
    {\textsl{#1}}}%
  \index{#1 (package)}}
\newcommand\Robject[1]{{\small\texttt{#1}}}
\newcommand\Rclass[1]{{\textit{#1}\index{#1 (class)}}}
\newcommand\Rfunction[1]{{{\small\texttt{#1}}\index{#1 (function)}}}
\newcommand\Rmethod[1]{{\texttt{#1}}}
\newcommand\Rfunarg[1]{{\small\texttt{#1}}}
\newcommand\Rcode[1]{{\small\texttt{#1}}}

%% Question, Exercise, Solution
\usepackage{theorem}
\theoremstyle{break} 
\newtheorem{Ext}{Exercise}
\newtheorem{Question}{Question}


\newenvironment{Exercise}{
  \renewcommand{\labelenumi}{\alph{enumi}.}\begin{Ext}%
}{\end{Ext}}
\newenvironment{Solution}{%
  \textbf{Solution:}\renewcommand{\labelenumi}{\alph{enumi}.}%
}{\bigskip}