Rmarkdown生成PDF的模板

---
title: "HUMAN"
author: "MLP"
date: "`r Sys.Date()`"
output:
  pdf_document: 
    latex_engine: xelatex
    extra_dependencies:
      ctex: UTF8
    number_sections: yes
    df_print: kable
    toc: yes
classoptions: "hyperref, 12pt, a4paper"
---

注意:

echo=FALSE，会将代码不输出，而只是输出代码运行的结果
warning=FALSE, message = FALSE表示不输出警告信息（否则有时候虽然代码运行成功，但是会生成的PDF上有一堆警告信息感觉也很烦）

knitr::opts_chunk$set(echo = FALSE,warning = FALSE, message = FALSE) 

R Markdown

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

When you click the Knit button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:

summary(cars)

Including Plots

You can also embed plots, for example:

plot(pressure)

Note that the echo = FALSE parameter was added to the code chunk to prevent printing of the R code that generated the plot.
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