如何在表格中使用 ceil 函数？

Question

在普通文本中有效\begin{equation}...\end{equation}但在表格中无效的代码；从此扩展而来线。

\documentclass{article}
\usepackage{mathtools}
\DeclarePairedDelimiter\ceil{\left\lceil}{\right\rceil}
\DeclarePairedDelimiter\floor{\left\lfloor}{\right\rfloor}

\begin{document}

\begin{table}
\center
\begin{tabular}{ | l | l | }
\hline
Best case height of B-tree & $\ceil{ \log\limits_{m} \left( n+1 \right) }$ \\ \hline
\end{tabular}
\end{table}

\end{document}

给出错误

Overfull \hbox (35.21378pt too wide) in paragraph at lines 578--579
 [] 
<use  "settings.jpg" > [10] [11] [12]
! Extra }, or forgotten \right.
\MT_delim_ceil_nostar_wrapper:nnn ...mathopen {#1}
                                                  #2\mathclose {#3}
l.614 \ceil{ \log\limits_{m} \left( n+1 \right) }

? 
! Missing } inserted.
<inserted text> 
                }
l.614 \ceil{ \log\limits_{m} \left( n+1 \right) }

? 
! Extra }, or forgotten \right.
\MT_delim_floor_nostar_wrapper:nnn ...athopen {#1}
                                                  #2\mathclose {#3}
l.621 ...ts_{d} \left( \frac{ n+1 }{ 2 } \right) }
                                                  .
? 
! Missing } inserted.
<inserted text> 
                }
l.621 ...ts_{d} \left( \frac{ n+1 }{ 2 } \right) }
                                                  .
? 
! Extra }, or forgotten \right.
\MT_delim_ceil_nostar_wrapper:nnn ...mathopen {#1}
                                                  #2\mathclose {#3}
l.636 ...eil{ \log\limits_{m} \left( n+1 \right) }
                                                  $ \\ \hline
? 
! Missing } inserted.
<inserted text> 
                }
l.636 ...eil{ \log\limits_{m} \left( n+1 \right) }
                                                  $ \\ \hline
? 
)
Runaway argument?
{ \log \limits _{d} \left ( \frac { n+1 }{ 2 }$ \\ \hline Insertion i\ETC.
! File ended while scanning use of \\MT_delim_floor_nostar:.
<inserted text> 
                \par 
<*> answer.tex

Answer 1

您误用了\left和\right。 的定义\ceil不应该有它们；它们在 周围也是多余的n+1。

还要注意，这\log\limits是没有意义的，因为\log永远不会取上下限。顺便说一句，在表格中的事实完全无关紧要。

\documentclass{article}
\usepackage{mathtools,booktabs}
\DeclarePairedDelimiter\ceil{\lceil}{\rceil}
\DeclarePairedDelimiter\floor{\lfloor}{\rfloor}

\begin{document}

\begin{table}
\center
\begin{tabular}{ll}
Best case height of B-tree & $\ceil{\log_{m} (n+1)}$ \\
\addlinespace
Best case height of B-tree & $\ceil[\big]{\log_{m} (n+1)}$ \\
\addlinespace
Best case height of B-tree & $\ceil[\Big]{\log_{m} (n+1)}$ \\
\addlinespace
Best case height of B-tree & $\ceil*{\log_{m} (n+1)}$
\end{tabular}
\end{table}

\end{document}

请注意，在这种情况下，通过获得的自动大小\ceil*不会创建更大的分隔符。

始终建议浏览包装手册。