从编写R扩展的 1.4.2 ，您的小插曲需要有一行

From Writing R Extensions, section 1.4.2, your vignettes need to have a line

%\VignetteEngine{knitr::knitr}

；常见的范例是在小插图顶部的Yaml中添加以下内容

in them; a common paradigm is to add the following to the yaml at the top of the vignette

vignette: >
  %\VignetteIndexEntry{Integrating TCGA Data}
  %\VignetteEngine{knitr::rmarkdown}

VignetteIndexEntry为R的帮助系统提供了一个方便的标题。请记住 BiocStyle 包，用于创建外观一致的小插曲。

VignetteIndexEntry provides a convenient title for R's help system. Remember the BiocStyle package for creating vignettes with a consistent look.