#1.代码如下：

---
title: <center>This is my first report</center>
output:
  html_document:
    toc: true
    toc_float:
      collapsed: true
      smooth_scroll: true
    number: true
    number_sections: true
    theme: cerulean
runtime: shiny
---
#插入图片


#2.输出提示报错内容如图

#3.个人解决思路更改运行路径，但是行不通
```{r setup}
knitr::opts_knit$set(root.dir = 'D:/')
```

#