如何在knitr的pdf输出中保持带有图形标题的图形位置

我正在使用knitr(1.9.5和1.9.17)和rmarkdown(0.5.3.1)，并希望在pdf输出中保持数字位置.使用区块选项fig.pos="H"时，生成的pdf文件工作正常.

但是，当在中设置fig_caption: yes时，图形位置不会保持不变

我应该如何解决这个问题？谢谢你的建议.

编辑:

在学习了latex 的漂浮环境之后.我将float个包裹添加到标题中.

\usepackage{float}

但是，生成的tex文件在figure环境中始终使用htbp，因为使用了fig.pos个选项.手动将htbp更改为H后，所有图形的位置保持不变.

这是我的rmd文件示例:

---
title: "Untitled"
output:
  pdf_document:
    fig_caption: yes
    includes:
        in_header: mystyles.sty
---

# Section 1


Note that the `echo = FALSE` parameter was added to the code chunk to prevent printing of the R code that generated the plot.

Note that the `echo = FALSE` parameter was added to the code chunk to prevent printing of the R code that generated the plot.

Note that the `echo = FALSE` parameter was added to the code chunk to prevent printing of the R code that generated the plot.

Note that the `echo = FALSE` parameter was added to the code chunk to prevent printing of the R code that generated the plot.


```{r fig1, echo=FALSE, fig.height=8.5, fig.pos="H"}
plot(cars)
```

# Section 2

More test

```{r fig2, echo=FALSE, fig.height=8.5, fig.pos="H"}
plot(cars)
```

# Section 3

```{r fig3, echo=FALSE, fig.height=8.5, fig.pos="H"}
plot(cars)
```

More test