如何在knitr::kable()中创建适合目录显示的简短标题？

Great question—long captions cluttering up tables of contents are such a common annoyance! Here are a couple of straightforward ways to set a short, clean caption for your table of contents while keeping the full descriptive caption for your table:

Method 1: Use Bookdown's Dual Caption Support #

If you're using bookdown (ideal for documents with tables of contents, cross-references, etc.), you can pass a two-element vector to the caption argument in kable(). The first element will be the short caption shown in the table of contents, and the second will be the full descriptive caption displayed with the table:

library(dplyr)
library(knitr)
library(kableExtra)

df <- data.frame(
  X = sample(letters, 10),
  y = runif(10),
  z = sample(10:20, 10)
)

kable(df, booktabs = TRUE, 
      caption = c("Sample Data Table", 
                  "This caption is way too long and doesnt look good when formatted in the Table of Contents. What you really need here is a much shorter caption so that your eyes dont go crazy trying to figure out what information the author is trying to convey. Often there is too much information in ..."))

Bookdown will automatically handle separating the two captions—you'll see the short version in your TOC and the full text below/above your table.

Method 2: LaTeX Direct Caption Syntax (for PDF Outputs) #

If you're compiling to PDF without bookdown, you can use raw LaTeX syntax in your caption to define a short TOC entry. Wrap the short caption in square brackets followed by the full caption in curly braces, prefixed with \\caption:

kable(df, booktabs = TRUE, 
      caption = "\\caption[Sample Data Table]{This caption is way too long and doesnt look good when formatted in the Table of Contents. What you really need here is a much shorter caption so that your eyes dont go crazy trying to figure out what information the author is trying to convey. Often there is too much information in ...}")

When your document compiles to PDF, LaTeX will use the text in square brackets for the table of contents and the curly brace text for the table's actual caption.

内容的提问来源于stack exchange，提问作者Caddisfly