This a tutorial on how to use rmarkdown 在这里打字不需要加＃号 use tooth growth dataset.

to run R code is a markdown file, we need to dentote the section that is considered R code(要标出Rcode部分).这部分被称为code chunk below is code chunk:

Toothdata <- ToothGrowth
head(Toothdata)
##    len supp dose
## 1  4.2   VC  0.5
## 2 11.5   VC  0.5
## 3  7.3   VC  0.5
## 4  5.8   VC  0.5
## 5  6.4   VC  0.5
## 6 10.0   VC  0.5
fit <- lm(len ~ dose, data = Toothdata)
b <- fit$coefficients
plot(len ~ dose, data = Toothdata)
abline(lm(len ~ dose, data = Toothdata))

The slope of the regression line is 9.7635714.

第二课

Section header

First level header

Second level header

Third level header

需要在#后面加空格才能起作用

  • one item
  • one item
  • one item
    • one more item
    • one more item
    • one more item
      • one last item 也需要空格，在r语言这很重要
  1. First item
  2. Second item
  3. Third item
  1. subitem 1
  2. subitem 2
  3. subitem 3

Block Quotes

we can use nice quotes into the markdown document. we do this by using the “>”这是一种引用形式，可以放在网页上？

“Genes are the story, and DNA is the language that the story is written in.”

— Sam Kean

Formulas

can put formatted formulas into markdown in (两个美元符号)

Hard-weinberg Formula \[p^2 +2pq + q^w=1\] And you can get really complex formula \[\Theta= \begin{pmatrix}\alpha & \beta\\ \gamma & \delta \end{pmatrix}\]

latex就是我用的poster网站，可以找到用在表格中的符号

Code chunks

Code chunk options

There are also options for your R Markdown file on how knitr interprets the code chunk.

Eval(T or F): whether or not to evaluate the code chunk(即不显示结果)

Echo(T or F): whether or not to show the code for the chunk（不影响显示结果） 下方例子会导致什么都不显示

Cache: If enable, the same code chunk will not be evaluated the next time that the knitr is run. Great for code that has LONG runtimes.（缓存） Cache（缓存）控制是否在下次“编织”时跳过重复计算。 如果 cache = TRUE，knitr 会保存上一次的运行结果； 下次执行时若代码没变，就直接用缓存结果，而不重新运行

fig.width or fig.height: the (graphical device) size of the R plots in inches. 设置 R 绘图的宽度和高度 The figures are first written to the knitr document then to files that are saved separately.

out.width and out.height: the output size of the R plots in the document（这是直接改原始文件，上面是改的机器输出的文件）

fig.cap: 加入figure caption

fit <-lm(len ~ dose,data = Toothdata)
b <- fit$coefficients
plot(len ~ dose, data = Toothdata)
abline(lm(len ~ dose, data = Toothdata))
The tooth growth of pigs

The tooth growth of pigs

table of contents

we can also add a table of contents to HTML document we do this by altering the YAMLcode(文件最上面的,有title什么的) we can add this: title: “rmarkdown learning” output: html_document: toc: true toc_float: true

date: “2025-11-11”

toc:增加目录 toc_float：增加目录的下拉菜单

Tabs

We can also add tabs in our report: need to specify each section that you want to become a tab by placing “{.tabset}” after the line. {.tabset}可以给模块增加smaller headers

Themes

add themes to HTML document that change highlighting color and hyperlink color of html output. 就是改网站标题的颜色 方法： you can change the theme in hte YAML to one of the followings: cerulean journal flatly readable spacelab united cosmo lumen paper sandstone simplex yeti null

you can change the color by specifying highlight: 在yaml中加highlight： default tango payments kate monochrome espresso zenburn

Theme和highlight只能选一个 Theme作用范围： 整个 HTML文档的布局与配色（标题、正文、边距、字体、背景等）。

highlight作用范围： R 代码块（{r} …）中代码与输出的显示颜色风格。

Code Folding

use the code_folding option to allow the reader to toggle between displaying the code and hiding the code.隐藏程序 YAML, is down with code_folding: hide

summary

There are a Ton of options and ways for you to customize your R code using the HTML format. This is a great way to display a portoflio of your work if you try to market yourself to interested parties 总体来说可以做自己的一个网站