我认为我的问题很简单，可以在没有 MRE 的情况下回答。这是引发错误的代码：
DSP %>%
kable(format = "latex",
digits = 2,
booktabs = T,
format.args = list(big.mark = ',')) %>%
kable_styling(font_size = 9,latex_options = c("striped", "scale_down")) %>%
column_spec(1, bold = TRUE) %>%
column_spec(10, bold = TRUE) %>%
row_spec(nrow(DSP), bold = T)
我在一个 RMarkdown 文件中运行它，我在 FOR 循环中执行，i = 50。换句话说，数据帧 DSP 重新生成 50 次，每次它有不同的行数。DSP 总是有 10 列。
我想加粗最后一行。
对于 i = 1，nrows = 14。没问题。对于 i=2，nrows=10。没问题。对于 i=3，nrows = 9。我得到这个：
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc +RTS -K512m -RTS statement_merge.utf8.md --to latex --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash-implicit_figures --output pandoc1246b13bd105f.pdf --template /Users/steve-guest/Library/R/3.4/library/rmarkdown/rmd/latex/default-1.17.0.2.tex --highlight-style tango --latex-engine pdflatex --variable graphics=yes --variable 'geometry:margin=1in'
! Package array Error: Illegal pream-token (N): `c' used.
See the array package documentation for explanation.
Type H <return> for immediate help.
...
l.123 \end{tabular}}
pandoc: Error producing PDF
Error: pandoc document conversion failed with error 43
In addition: Warning messages:
1: Removed 7 rows containing missing values (position_stack).
2: Removed 33 rows containing missing values (position_stack).
3: Removed 7 rows containing missing values (position_stack).
4: Removed 22 rows containing missing values (position_stack).
5: Removed 5 rows containing missing values (position_stack).
6: Removed 8 rows containing missing values (position_stack).
如果我然后nrow(DSP)用数字 9 替换并调用该render()语句，它仍然会失败，但会出现不同的错误消息：
output file: statement_merge.knit.md
/Applications/RStudio.app/Contents/MacOS/pandoc/pandoc +RTS -K512m -RTS statement_merge.utf8.md --to latex --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash-implicit_figures --output pandoc1246b295881e6.pdf --template /Users/steve-guest/Library/R/3.4/library/rmarkdown/rmd/latex/default-1.17.0.2.tex --highlight-style tango --latex-engine pdflatex --variable graphics=yes --variable 'geometry:margin=1in'
! Package array Error: Illegal pream-token (N): `c' used.
See the array package documentation for explanation.
Type H <return> for immediate help.
...
l.123 \end{tabular}}
pandoc: Error producing PDF
Error: pandoc document conversion failed with error 43
In addition: Warning messages:
1: Removed 5 rows containing missing values (position_stack).
2: Removed 8 rows containing missing values (position_stack).
有谁知道为什么会这样？更好的是，我该如何解决它？
谢谢！
编辑：pandoc 标头
---
output:
pdf_document:
fig_caption: false
header-includes:
- \usepackage{booktabs}
- \usepackage{longtable}
- \usepackage{array}
- \usepackage{multirow}
- \usepackage[table]{xcolor}
- \usepackage{wrapfig}
- \usepackage{float}
- \usepackage{colortbl}
- \usepackage{pdflscape}
- \usepackage{tabu}
- \usepackage{threeparttable}
- \definecolor{ufogrn}{rgb}{.2,.3,.1}
---