R Markdown转HTML时LaTeX矩阵显示异常问题求助

在R Markdown编辑器中矩阵显示正常，但转换为HTML输出时却显示R代码。我展示了beta_matrix的前20×6个元素，其形式如下：
其中$\hat{β}{j(k)}$是第k次迭代中$β_j$的估计值。
$$
\begin{equation}
\begin{pmatrix}
\hat{β}{0(1)} & \hat{β}{1(1)} & \cdots & \hat{β}{100(1)}\
\hat{β}{0(2)} & \ddots & & \
\vdots & & \ddots & \
\hat{β}{0(50)} & & & \hat{β}_{100(50)}
\end{pmatrix}
\end{equation}
$$
该矩阵在R Markdown视图中显示正常，但knit为HTML后显示异常，请问该如何解决？

以下是用户提供的xaringan幻灯片代码：

class: title-slide, center, middle
background-image: url(https://us.123rf.com/450wm/giddavr/giddavr1405/giddavr140500043/28389662-en-diagonal-graduado-resumen-antecedentes-sin-forma-difusa-pink.jpg?ver=6)
background-size: cover

# EXERCISE 12

## Ana

### University
`r format(Sys.Date(), '%B %e, %Y')`

---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
library(leaps)
library(ggplot2)
library(ggthemes)
library(xaringanthemer)
library(xaringanExtra)
download.file(
  "https://raw.githubusercontent.com/daneden/animate.css/master/animate.css",
  "animate.css"
)
knitr::opts_chunk$set(echo = TRUE,message = F,warning = F)
options(htmltools.dir.version = FALSE)
library(ISLR)
library(xaringanthemer)
library(xaringanExtra)
library(tidyverse)
style_solarized_light(
  text_bold_color = "#000000",
  header_color = "#D65DB1",
  inverse_text_color = "#ffffff",
  background_color = "#FBEAFF",
  code_highlight_color = "#D65DB1",
  text_color = "#000000"
)

class: middle, center, animated, fadeIn

This problem is a continuation of the previous exercise. In a toy example with p=100, show that estimates of the multiple linear regression coefficients can be approximated by repeatedly performing simple linear regression in a backfitting procedure. How many backfitting iterations are needed to get a "good" approximation to the estimates of the multiple regression coefficients? Create a graph to justify your answer.

title: "Exercise 12"
subtitle: "statistics"
author: "Ana"
institute: "Universisity"
date: "27/03/2023"
output:
xaringan::moon_reader:
lib_dir: libs
css:
- xaringan-themer.css
- xaringan-themer.css
- "https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.0/animate.min.css"
nature:
highlightStyle: github
highlightLines: true
countIncrementalSlides: false
seal: false #

class: middle, animated, bounceInRight

# 解决方案
- **移除冲突的公式环境**：你同时使用了Markdown块级公式标记`$$`和LaTeX的`\begin{equation}`环境，这会导致渲染异常。只需保留其中一种格式即可，推荐修改为：
  ```latex
  $$
  \begin{pmatrix}
  \hat{β}_{0(1)} & \hat{β}_{1(1)} & \cdots & \hat{β}_{100(1)}\\
  \hat{β}_{0(2)} & \ddots &  & \\
  \vdots &  & \ddots & \\
  \hat{β}_{0(50)} &  &  & \hat{β}_{100(50)}
  \end{pmatrix}
  $$

• 显式启用MathJax渲染：xaringan依赖MathJax渲染LaTeX公式，若默认配置失效，可在输出配置中显式添加mathjax: default：

  output:
    xaringan::moon_reader:
      lib_dir: libs
      css: 
        - xaringan-themer.css
        - xaringan-themer.css
        - "https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.0/animate.min.css"
      nature:
        highlightStyle: github
        highlightLines: true
        countIncrementalSlides: false
      mathjax: default
      seal: false
  

• 确认公式位置：确保LaTeX公式位于普通文本区域，而非R代码块内部。如果公式被错误包裹在代码块中，knit后会被当作代码显示。

内容的提问来源于stack exchange，提问作者user17050892