RMarkdown and YAML not able to load packages - r

Question

I have a text that I want to convert from latex to Markdown for various reasons. But I'm not able to make it work. If I load all the packages and only type "yo" as text, it's returning me an error.
Error in yaml::yaml.load(enc2utf8(string), ...) :
Scanner error: while scanning a directive at line 5, column 1could not find expected directive name at line 5, column 2
Calls: <Anonymous> ... yaml_load_utf8 -> mark_utf8 -> <Anonymous> -> .Call
Execution halted
Many people had this error before but I haven't saw somebody encountering this error so far and a solution for packages like this.
Can we write comments "%" in the preamble?
How can I add my latex packages in RMarkdown?
Will it work if I export it in word?
Here is my code:
---
title: "rest"
author: "Me"
date: '2016-10-26'
header-includes:
% Titles
- \usepackage{titlesec}
% figure
- \usepackage{color}
- \usepackage{graphicx} % Enhanced support for graphics
- \usepackage{subfig} % subfigure environment
- \usepackage{float} % Improved interface for floating objects
- \usepackage{rotating} % Rotation tools, including rotated full-page floats
% \usepackage[labelfont=bf]{caption} % Customising captions in floating environments
% tables
- \usepackage[table]{xcolor} % Driver-independent color extensions
- \usepackage{array} % Extending the array and tabular environments
- \usepackage{longtable} % Allow tables to flow over page boundaries
- \usepackage{multirow} % Create tabular cells spanning multiple rows
% math
- \usepackage{amssymb} % some weird math symbols
- \usepackage{amsthm}
- \usepackage{amsmath} % AMS mathematical facilities for LATEX
% documents aspect
- \usepackage{lineno} % Line numbers on paragraphs
- \usepackage[top=2.2cm, left=2.2cm,right=2.2cm,bottom=4.2cm]{geometry} % Flexible and complete interface to document d=imensions
% see geometry.pdf on how to lay out the page. There's lots.
- \usepackage[utf8]{inputenc} % Accept different input encodings
- \usepackage[T1]{fontenc}
- \usepackage{lscape} % Place selected parts of a document in landscape
- \usepackage{babel}
% reference in text
- \usepackage[unicode=true, pdfusetitle, bookmarks=true, bookmarksnumbered=false, bookmarksopen=false, breaklinks=true, pdfborder={0 0 0}, backref=page,colorlinks=true]
{hyperref}
- \newcommand*{\fullref}[1]{\hyperref[{#1}]{\autoref*{#1} \nameref*{#1}}}
% bibliography
%\usepackage[style=authoryear, backend=bibtex,bibencoding=ascii]{biblatex} % Bibliographies in LATEX using BibTEX for sorting only
- \usepackage{natbib} % Flexible bibliography support
% \usepackage{translation-natbib-fr} %French translation of the documentation of natbib
%\renewbibmacro{in:}{}
%\bibliography{yo.bib}
% \ref{} makes reference to a \label{} set in a table or figure
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Textclass specific LaTeX commands.
- \theoremstyle{plain}
title: "data"
author: "Me"
date: '2016-10-26'
output:
pdf_document: default
word_document: default
documentclass: article % - \documentclass[english]{scrartcl
output: pdf_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
YO

Answer 1

Your header contains invalid YAML, inline comments need #:
---
title: "rest"
author: "Me"
date: '2016-10-26'
header-includes:
# Titles
- \usepackage{titlesec}
# figure
- \usepackage{color}
- \usepackage{graphicx}
...
You'll also need to de-duplicate your YAML map keys. Sure, you can render RMarkdown to Word with the obvious caveat that LaTeX-specific formatting won't automagically carry over.