2020-10-21, Wednesday

发现一个神奇功能，可以用Markdown格式让R code可以直接复制。
（于是神奇的用完了今天简书更新次数：每天只能发布2篇、每篇只能更新5次/日），静静等待过了0点再发文。。。奇葩）

1. 选择Markdown编辑器

   
   
   image.png

2. 输入这样的符号

   
   
   image.png
   
   

   就会带框框，且读者可以直接复制R代码，像这样：

   
   
   image.png
3. 高亮一些重点词，输入这样的符号：

就会用特殊格式高亮，像这样：

summary(cars$dist)
summary(cars$speed)

There were `r nrow(cars)` cars studied

There were `r nrow(cars)` cars studied

### There were `r nrow(cars)` cars studied

### There were `r nrow(cars)` cars studied

There were r nrow(cars) cars studied

Markdown Quick Reference
R Markdown is an easy-to-write plain text format for creating dynamic documents and reports. See Using R Markdown to learn more.
Emphasis
italic bold

italic bold
Headers

Header 1

Header 2

Header 3

Lists
Unordered List

• Item 1
• Item 2
  • Item 2a
  • Item 2b
    Ordered List

1. Item 1
2. Item 2
3. Item 3
   • Item 3a
   • Item 3b
     Manual Line Breaks
     End a line with two or more spaces:

Roses are red,
Violets are blue.
Links
Use a plain http address or add a link to a phrase:

http://example.com

linked phrase
Images
Images on the web or local files in the same directory:

[图片上传失败...(image-c674f0-1620230207698)]

[图片上传失败...(image-3039e3-1620230207698)]
Blockquotes
A friend once said:

It's always better to give
than to receive.
R Code Blocks
R code will be evaluated and printed

summary(cars$dist)
summary(cars$speed)

Inline R Code
There were r nrow(cars) cars studied
Plain Code Blocks
Plain code blocks are displayed in a fixed-width font but not evaulated

This text is displayed verbatim / preformatted

Inline Code
We defined the add function to
compute the sum of two numbers.
LaTeX Equations
Inline Equation

Display Equation

Horizontal Rule / Page Break
Three or more asterisks or dashes:

Tables

Reference Style Links and Images
Links
A linked phrase.

At the bottom of the document:

Images

At the bottom of the document:

Miscellaneous
superscript²

subscript₂

strikethrough
Typographic Entities
ASCII characters are transformed into typographic HTML entities:

Straight quotes ( " and ' ) into “curly” quotes
Dashes (“--” and “---”) into en- and em-dash entities
Three consecutive dots (“...”) into an ellipsis entity