使用knitr :: include_graphics在for循环中插入图像 [英] Insert images using knitr::include_graphics in a for loop

问题描述

```{r}
knitr::include_graphics(path = "~/Desktop/R/Files/apple.jpg/")
```

上面的代码块工作正常.但是，当我创建一个for循环时，knitr::include_graphics似乎无法正常工作.

The above code chunk works fine. However, when I create a for loop, knitr::include_graphics does not appear to be working.

```{r}
fruits <- c("apple", "banana", "grape")
for(i in fruits){
  knitr::include_graphics(path = paste("~/Desktop/R/Files/", i, ".jpg", sep = ""))
}
```

推荐答案

这是一个已知问题 knitr include_graphics在#1260循环中不起作用.

一种解决方法是在for循环内生成图像的路径，并cat它们.要显示最终结果，需要result = "asis".

A workaround is to generate paths to images within a for loop and cat them. To show final result result = "asis" is required.

```{r, results = "asis"}
fruits <- c("apple", "banana", "grape")
for(i in fruits) {
    cat(paste0("![](", "~/Desktop/R/Files/", i, ".jpg)"), "\n")
}
```

每次迭代都会在此处生成图形的降价路径(例如，"![](~/Desktop/R/Files/apple.jpg)")

Here each iteration generates markdown path to graphics (eg, "![](~/Desktop/R/Files/apple.jpg)")

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