knitr:编织具有解析错误的块 [英] knitr: knitting chunks with parsing errors

问题描述

是否可以编织带有解析错误的块?

Is it possible to knit chunks with parsing errors?

我想制作一个文档，说明在使用R进行编码时可以发现的一些不同类型的错误，但是，即使使用error = TRUE，我似乎也无法编织带有分析错误的块.

I want to produce a document explaining some different types of errors one can find while coding in R, but it seems that I can't knit a chunk with parsing error, even with error = TRUE.

例如，此块工作正常，并显示错误消息:

For example, this chunk works fine and it shows the error messages:

```{r sum character, error = TRUE}
"1" + "2"
```

但是，该块不是:

```{r missing parenthesis, error = TRUE}
f <- function(x){
  z <- sum(x
  #
  y <- x + 1
  return(x + y + z)
}
```

它给出错误:Error in parse(text = x, srcfile = src).

这里的想法是在缺少括号"的块中显示所有错误消息，这可能吗?

The idea here would be to show all error messages in the chunk "missing parenthesis", is this possible?

推荐答案

此自 evaluate 包> = v0.8.4(预计将来在CRAN上为v0.9).目前，您可以从Github安装评估 .

This has become possible since the evaluate package >= v0.8.4 (which is expected to be v0.9 on CRAN in the future). For now, you can install evaluate from Github.

这篇关于knitr:编织具有解析错误的块的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！