从列表打印ggplots不工作在knitr与rmarkdown [英] Printing ggplots out of list does not work in knitr with rmarkdown

问题描述

我想把ggplots放入列表，然后在列表中打印每一个。这应该使用rmarkdown和knitr在RStudio。 MWE（当然，实际上，列表中填充别的地方比打印）：

I would like to put ggplots into a list and then later print each one in the list. That should be done with rmarkdown and knitr in RStudio. MWE (of course, in real, the list gets filled somewhere else than printed):

---
title: "nice title"
author: "Me"
date: 12\. Januar 2016
output:
  pdf_document:
    fig_caption: yes
    fig_width: 7
    keep_tex: yes
    number_sections: yes
    toc: yes
  html_document: default
---

Here is my plot:

```{r, echo=F}
library(ggplot2)
printGGlist <- function(gglist){
for(gg in gglist){

    print(gg)

  }
}
g1 <- ggplot(diamonds, aes(carat, cut)) + geom_point()
g2 <- ggplot(diamonds, aes(carat, cut)) + geom_density()
gg <- list(g1, g2)
printGGlist(gg)
```
more text

但我得到的LaTeX代码是

The LaTeX code I get is however

\includegraphics{MyProject_files/figure-latex/unnamed-chunk-7-1.pdf}!
\href{MyProject_files/figure-latex/unnamed-chunk-7-2.pdf}{}!
\href{MyProject_files/figure-latex/unnamed-chunk-7-3.pdf}{}!

当然结果不是很漂亮。

Of course the result is not pretty. What happended here?

推荐答案

这是最近在 knitr 1.12中引入的错误，它在开发版本（> = 1.12.2）中： https://github.com/yihui/knitr#安装

This is a bug recently introduced in knitr 1.12, and I have fixed it in the development version (>= 1.12.2): https://github.com/yihui/knitr#installation

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