kable with longtable=FALSE still produces longtable

[vsimko]

The following code:

kable(head(cars), longtable = FALSE)

Produces:

\begin{longtable}[c]{@{}rr@{}}
\toprule
speed & dist\tabularnewline
\midrule
\endhead
4 & 2\tabularnewline
4 & 10\tabularnewline
7 & 4\tabularnewline
7 & 22\tabularnewline
8 & 16\tabularnewline
9 & 10\tabularnewline
\bottomrule
\end{longtable}

However, when format="latex" is added, the code:

kable(head(cars), longtable = FALSE, format = "latex")

Produces the expected output:

\begin{tabular}{r|r}
\hline
speed & dist\\
\hline
4 & 2\\
\hline
4 & 10\\
\hline
7 & 4\\
\hline
7 & 22\\
\hline
8 & 16\\
\hline
9 & 10\\
\hline
\end{tabular}

See also this reproducible example:
kable_issue.zip

[yihui]

The default output is a markdown table when kable() is used in an Rmd document. It is Pandoc that converts the markdown table to longtable.

[vsimko]

Then, it would be useful to inform the user that he shouldn't use longtable = FALSE when markdown is used - a warning perhaps.

[yihui]

That makes sense. There is actually an internal hack that you may use: knitr::opts_knit$get(kable.force.latex = TRUE) After setting that, kable() will generate LaTeX tables if the output format is LaTeX.

[github-actions]

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