我做了一个小包装来重现这个问题:

# example package
devtools::install_github("privefl/minipkg")

# example Rmd
rmd <- system.file("extdata", "Matrix.Rmd", package = "minipkg")
writeLines(readLines(rmd))  ## see content

# works fine
rmarkdown::render(
  rmd,
  "all",
  envir = new.env(),
  encoding = "UTF-8"
)

# !! does not work !!
minipkg::my_render(rmd)
minipkg::my_render  ## see source code

我不明白为什么行为不同以及如何解决这个问题。

编辑: 我知道我可以用 Matrix::t() . 我的问题更多的是“为什么我需要在这个特定的情况下使用它,而不是在所有其他情况下(例如 rmarkdown::render() 在包裹外面?“.

误差

Quitting from lines 10-13 (Matrix.Rmd) 
Error in t.default(mat) : argument is not a matrix

矩阵文件

---
output: html_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

```{r}
library(Matrix)
mat <- rsparsematrix(10, 10, 0.1)
t(mat)
```

控制台输出:

> # example package
> devtools::install_github("privefl/minipkg")
Downloading GitHub repo privefl/minipkg@master
✔  checking for file ‘/private/var/folders/md/03gdc4c14z18kbqwpfh4jdfc0000gr/T/RtmpKefs4h/remotes685793b9df4/privefl-minipkg-c02ae62/DESCRIPTION’ ...
─  preparing ‘minipkg’:
✔  checking DESCRIPTION meta-information ...
─  checking for LF line-endings in source and make files and shell scripts
─  checking for empty or unneeded directories
─  building ‘minipkg_0.1.0.tar.gz’

* installing *source* package ‘minipkg’ ...
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
* DONE (minipkg)
> # example Rmd
> rmd <- system.file("extdata", "Matrix.Rmd", package = "minipkg")
> writeLines(readLines(rmd))  ## see content
---
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

```{r}
library(Matrix)
mat <- rsparsematrix(10, 10, 0.1)
t(mat)
```

> # works fine
> rmarkdown::render(
+   rmd,
+   "all",
+   envir = new.env(),
+   encoding = "UTF-8"
+ )


processing file: Matrix.Rmd
  |.............                                                    |  20%
  ordinary text without R code

  |..........................                                       |  40%
label: setup (with options) 
List of 1
 $ include: logi FALSE

  |.......................................                          |  60%
  ordinary text without R code

  |....................................................             |  80%
label: unnamed-chunk-1
  |.................................................................| 100%
  ordinary text without R code


output file: Matrix.knit.md

/usr/local/bin/pandoc +RTS -K512m -RTS Matrix.utf8.md --to html4 --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash+smart --output Matrix.html --email-obfuscation none --self-contained --standalone --section-divs --template /Library/Frameworks/R.framework/Versions/3.5/Resources/library/rmarkdown/rmd/h/default.html --no-highlight --variable highlightjs=1 --variable 'theme:bootstrap' --include-in-header /var/folders/md/03gdc4c14z18kbqwpfh4jdfc0000gr/T//RtmpKefs4h/rmarkdown-str68525040df1.html --mathjax --variable 'mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML' --metadata pagetitle=Matrix.utf8.md 

Output created: Matrix.html
> # !! does not work !!
> minipkg::my_render(rmd)


processing file: Matrix.Rmd
  |.............                                                    |  20%
  ordinary text without R code

  |..........................                                       |  40%
label: setup (with options) 
List of 1
 $ include: logi FALSE

  |.......................................                          |  60%
  ordinary text without R code

  |....................................................             |  80%
label: unnamed-chunk-1
Quitting from lines 10-13 (Matrix.Rmd) 
Error in t.default(mat) : argument is not a matrix

> minipkg::my_render  ## see source code
function (rmd) 
{
    rmarkdown::render(rmd, "all", envir = new.env(), encoding = "UTF-8")
}
<bytecode: 0x7f89c416c2a8>
<environment: namespace:minipkg>
>