编织R-Markdown文档会导致“！未定义控制序列”错误

问题描述

我正在创建R Markdown文档，并在尝试打印数学公式时不断出错。我认为错误在标头中的某处，但我无法完全确定。这是文档的精简版本：

---
output: 
  pdf_document:
    keep_tex: yes
    latex_engine: xelatex
header-includes: |
  \usepackage{nath}
  \usepackage{amsmath}
title: "Test Report"
toc: true
number_sections: true
graphics: yes
toc_depth: 2
df_print: kable
fontsize: 13pt
editor_options: 
  chunk_output_type: console
---

```{r setup,include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## 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:

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

**`r 5 * 20`** entries in the dataset; 


Testing mathematical symbols,$\varepsilon _{u,i}$.  
The formula used for this is:
$$ Y_{u,i} = \mu  + \varepsilon _{u,i} $$
Where $\Y_{u,i}$ is the predicted rating per user,per movie and $\mu$ is the "true" rating for all movies. Mu-hat -> $\hat{mu}$ .

## Including Plots

You can also embed plots,for example:

```{r pressure,echo=FALSE}
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.

这是错误消息：

output file: final_testing.knit.md

! Undefined control sequence.
\mathop ...\o@mathop {#1}} \else \def \mathop@arg 
                                                  {#1} \def \afterparse@ {\m...
l.112 \begin{document}

Error: LaTeX failed to compile final_testing.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See final_testing.log for more info.
Execution halted

对此事的任何投入，我们深表感谢。 TIA

解决方法

我做了以下事情：

• 评论了乳胶引擎（可能是让Rmarkdown自行选择）
• 在services.AddAuthentication(options => { options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme; }) .AddJwtBearer("ADB2C",jwtOptions => { jwtOptions.Authority = $"{appConfiguration.AppSettings.Adb2cInstance}/{appConfiguration.AppSettings.Adb2cDomain}/{appConfiguration.AppSettings.Adb2cPolicy}/v2.0/"; jwtOptions.Audience = appConfiguration.AppSettings.Adb2cClientId; jwtOptions.RequireHttpsMetadata = bool.Parse(configuration["AppSettings:RequireHttpsMetadata"]); //// NOTE:: This is set only for dev purposes. Remove for higher environments. jwtOptions.Events = new JwtBearerEvents { OnAuthenticationFailed = arg => { // invoked if authentication fails return Task.FromResult(0); } }; }); services.AddAuthorization(options => { options.DefaultPolicy = new AuthorizationPolicyBuilder().RequireAuthenticatedUser().AddAuthenticationSchemes("ADB2C").Build(); }); 之后删除了|
• 在header-includes:之前插入-
• 注释了软件包\usepackage{}，因为它似乎没有加载
• 更改了nath，因为没有fontsize: 12pt
• 公式中已删除空格和几个反斜杠

现在为我工作，也希望你吗？

13pt