r - Bookdown - 在哪里加载包

Question

我有一个大型书籍项目，我想检查一个章节是否有效。
我已经编写了它，以便我需要的所有包都加载到 Index.Rmd

但是，当我尝试渲染这本书或预览一章时，它作为功能失败 %>%未找到，即使 library(dplyr)在 Index.Rmd 中。

真的有必要在 bookdown 项目的每一章开头加载相同的包吗？还是我错过了什么？

Answer 1

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

这取决于您的 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，也可以使用 :: 引用该函数。符号，例如 knitr::kable(head(iris, 20))补充:有关如何继续的更多信息，请查看 bookdown manual .