Bookdown - 在哪里加载包

Question

我有一个大型 bookdown 项目，我想检查其中一章是否有效。 我已经写好了，所以我需要的所有包都在 Index.Rmd

中加载

然而，当我尝试渲染这本书或预览一章时，它失败了，因为找不到函数 %>%，即使 library(dplyr) 在 Index.Rmd 中。

是否真的有必要在 bookdown 项目的每一章开头加载相同的包？还是我遗漏了什么？

Answer 1

Is it really necessary to load the same packages 
at the start of each chapter in a bookdown project? 

这取决于你的 knitr 方法：

Merging all chapters into one Rmd file and knitting it is one way to render the book in bookdown. There is actually another way: you may knit each chapter in a separate R session, and bookdown will merge the Markdown output of all chapters to render the book. We call these two approaches “Merge and Knit” (M-K) and “Knit and Merge” (K-M), respectively. …

M-K runs all code chunks in all chapters in the same R session, whereas K-M uses separate R sessions for individual chapters. For M-K, the state of the R session from previous chapters is carried over to later chapters (e.g., objects created in previous chapters are available to later chapters, unless you deliberately deleted them); for K-M, all chapters are isolated from each other.

如果您不想加载库，您也可以使用 :: 符号引用该函数，例如knitr::kable(head(iris, 20))

已添加：有关如何继续的更多信息，请查看 bookdown manual。