xaringan：添加带有宏的自定义 Latex 文件

Question

是否可以导入 Latex 宏文件，例如

\newcommand{\Xcal}{\mathcal{X}

这样我就可以在 $...$ 之间使用它作为 $\Xcal$ ?

Answer 1

是的，这似乎有效：

---
title: "Presentation Ninja"
subtitle: "⚔<br/>with xaringan"
author: "Yihui Xie"
date: "2016/12/12 (updated: `r Sys.Date()`)"
output:
  xaringan::moon_reader:
    lib_dir: libs
    nature:
      highlightStyle: github
      highlightLines: true
      countIncrementalSlides: false
---

<script type="text/x-mathjax-config">
MathJax.Hub.Config({
  TeX: {
    Macros: {
      Xcal: "{\mathcal{X}}",
      water: "{H_2O}"
    }
  }
});
</script>

$\water$    
$\Xcal$

在脚本标签上使用 type=text/x-mathjax-config 很重要，这样 mathjax 才能找到块。有关在中定义宏的详细信息可以找到 MathJax here.

另一种方法是使用 before_body YAML 选项包含定义：

---
title: "Presentation Ninja"
subtitle: "⚔<br/>with xaringan"
author: "Yihui Xie"
date: "2016/12/12 (updated: `r Sys.Date()`)"
output:
  xaringan::moon_reader:
    lib_dir: libs
    nature:
      highlightStyle: github
      highlightLines: true
      countIncrementalSlides: false
    includes:
      before_body: local.html
---

Answer 2

MathJax 允许您定义宏。在 Xaringan 中，您只需将宏放在双美元符号中。

---
title: "Presentation Ninja"
subtitle: "⚔<br/>with xaringan"
author: "Yihui Xie"
date: "2016/12/12 (updated: `r Sys.Date()`)"
output:
  xaringan::moon_reader:
    lib_dir: libs
    nature:
      highlightStyle: github
      highlightLines: true
      countIncrementalSlides: false
---

$$\newcommand{\Xcal}{\mathcal{X}}$$

# Math Macros

You can define your own macros by putting them in double dollars signs.

```
$$\newcommand{\Xcal}{\mathcal{X}}$$
```

This symbol $\Xcal$ is a calligraphic X.

xaringan：添加带有宏的自定义 Latex 文件

xaringan: add custom Latex file with macros

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