如何在R markdown中注释掉R代码块？ [英] how to comment out R code blocks in R markdown?

问题描述

我正在编辑一个R标记文件（.Rmd），该文件具有很多R代码块，可以将这些代码块组移动到子文档中，以简化重新排列节的内容（如果没有其他操作）。在将节转换为子文档时，我想在不运行其余块和其他子文档的情况下测试新的子文档。但是，当我用来注释掉那些部分时，R块仍然运行（但是RStudio使这些部分看起来像被注释掉一样看起来）。

I'm editing an R markdown file (.Rmd) that has a lot of R code blocks to move groups of those code blocks into "child" documents to simplify rearranging sections (if nothing else). As I convert sections to child documents, I would like to test the new child document without running the rest of the blocks and other children. However, when I use to comment out those sections, the R blocks still run (but RStudio makes the sections "look" as though they were commented out).

如果我如果消除前面和后面的`（即代码块指示符），则注释可以正常工作。但是，正如我说的那样，我有很多代码块，并且这样会更方便。

If I eliminate the preceding and trailing "```"s (i.e., the code block signifiers), the commenting works fine. However, as I said, I've got lots of code blocks and something like would be more convenient.

因此，如何注释掉R代码块，以便它们不会运行？

So, how do I comment out the R code blocks so they won't run?

推荐答案

在RStudio中，如果您突出显示（至少）R代码上方的一行块（至少）到R代码块的最后一行， ¹ ，然后键入ctrl-shift-C（在OSX或Windows中）或command-shift-C（仅OSX） ），RStudio会将html注释标签放在该块上。

In RStudio, if you highlight from (at least) one row above an R code chunk to (at least) the last row of the R code chunk,¹ and then type ctrl-shift-C (in OSX or Windows) or command-shift-C (OSX only), RStudio will place html comment tags on the chunk.

例如：

```{r cars}
summary(cars)
plot(pressure)
```

在突出显示此内容并键入ctrl-shift-C之后，它变为：

After highlighting this and type ctrl-shift-C, this becomes:

<!-- ```{r cars} -->
<!-- summary(cars) -->
<!-- plot(pressure) -->
<!-- ``` -->

要有选择地注释掉多个块，可以使用RStudio查找/替换工具并选中regex选项。 。它需要两个替换步骤（可能可以在一个步骤中完成，但是我不确定如何在RStudio中跨行捕获正则表达式。）

To selectively comment out multiple chunks, you can use the RStudio find/replace tool with the regex option checked. It takes two replacement steps (it can probably be done in one step, but I'm not sure how to do a regex to capture across multiple lines in RStudio).

步骤1：注释掉一个或多个块的第一行：

Step 1: Comment out the first line of one or more chunks:

查找：（```{r 。*）

替换：<！-\1

步骤2：注释一个或多个块的最后一行：

Step 2: Comment out the last line of one or more chunks:

查找：（```）$

替换： \1->

---

^{1您必须在突出显示部分中包含该行上方的行。否则，RStudio会将R注释标签（＃）放在该块的每一行的开头，并且注释行将在输出文档中显示为纯文本。}

---

^{1 You must include the row above the chunk in the highlight. Otherwise, RStudio will place R comment tags (#) at the beginning of each row of the chunk and the commented lines will appear as plain text in the output document.}

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