RMarkdown 中的编号代码块 [英] Numbered Code Chunks in RMarkdown

问题描述

是否可以为 RMarkdown 中的代码块提供一个选项，以便将 cell number 附加到 HTML 输出.就像 Jupyter 有单元格编号一样.

我看过一些行编号示例，这不是我想要的.

当我与某人通过电话讨论 RMarkdown HTML 文件时，使用手机号码很有帮助.我可以请他/她查看单元格 23.我有很多 R 代码，因此提供部分标题虽然可能，但很乏味.

解决方案

这是一个仅使用 CSS 的解决方案.它依赖于

---标题:块计数器"作者:罗曼·勒苏尔"输出:html_document---```{css，echo=FALSE}身体 {counter-reset: counter-rchunks;}div.主容器{padding-left: 5em;}前.r {计数器增量:计数器块；位置:相对；溢出:可见；}前.r::before {内容:'在['计数器(counter-rchunks)']:';显示:内联块；位置:绝对；左:-5em；颜色:RGB(48、63、159)；}`````{r 汽车}总结(汽车)`````{r 头车}头(车)``

您可能需要将此解决方案适应您的 HTML 模板.
您还可以将这些 CSS 规则插入到 .css 文件中，并将其包含在您的 html_document 中.

Is there an option I can provide to code chunks in RMarkdown so that it will have a cell number attached to the HTML output. Much like Jupyter has cell numbers.

I've seen some example with line numbering which is not what I want.

Using cell numbers is helpful when I'm discussing an RMarkdown HTML file over the phone with someone. I can ask him/her to see cell 23. I have a lot of R code, so providing section titles, while possible, is tedious.

解决方案

Here's a solution using only CSS. It relies on CSS counters: each new R chunk increments the counter (named counter-rchunks).

You can knit the following minimal Rmd file and get this result:

---
title: "Counter for chunks"
author: "Romain Lesur"
output: html_document
---

```{css, echo=FALSE}
body {
  counter-reset: counter-rchunks;
}

div.main-container {
  padding-left: 5em;
}

pre.r {
  counter-increment: counter-rchunks;
  position: relative;
  overflow: visible;
}

pre.r::before {
  content: 'In [' counter(counter-rchunks) ']: ';
  display: inline-block;
  position: absolute;
  left: -5em;
  color: rgb(48, 63, 159);
}
```

```{r cars}
summary(cars)
```

```{r head-cars}
head(cars)
```

You may have to adapt this solution to your HTML template.
You also can insert these CSS rules to a .css file and includes it in your html_document.

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