General ⇒ How to vertically center an equation in a merged row?

[yoyoimut]

Dear all,

I have an equation in a multi row cell (aka a merged cell) that should be vertically centered.

I do using the following code snippet:

Code: Select all

\documentclass{article}
\usepackage{multirow,longtable,array}

\begin{document}
\begin{tabular}{|*{2}{c|}}
\hline
\parbox[c][1cm]{5cm}{Description} & \parbox[c][1cm]{5cm}{Formula}\\\hline
\multirow{3}*{\parbox[c][1cm]{5cm}{%
																				\centering$\displaystyle \int_a^b f(x)\, \textrm{d}x=F(b)-F(a)$
																		 }%
								}%
										&\parbox[c][1cm]{5cm}{ A } \\\cline{2-2}
                		&\parbox[c][1cm]{5cm}{ B } \\\cline{2-2}
                		&\parbox[c][1cm]{5cm}{ C } \\\hline
\parbox[c][1cm]{5cm}{D} & \parbox[c][1cm]{5cm}{E}\\\hline
\end{tabular}

\end{document}

With the output as follows:

verticallyCentered.jpg (51.21 KiB) Viewed 5189 times

Is there a way to make it vertically centered without doing trial and error adjustments?


Thank you in advance.

regards,

Yoyo

[php1ic]

I think the formula in your MWE is vertically centered over 3 standard rows. By expanding the height with \parbox the alignment is lost.

Try changing the distance between rows to get vertical alignment

Code: Select all

\documentclass{article}
\usepackage{multirow,longtable,array}

\begin{document}

\renewcommand{\arraystretch}{2}
\begin{tabular}{|p{5cm}|p{5cm}|}
\hline
Description & Formula\\
\hline
\multirow{3}{*}{$\displaystyle \int_a^b f(x)\, \textrm{d}x=F(b)-F(a)$} & A\\
\cline{2-2}
  & B \\
\cline{2-2}
  & C \\
\hline
D & E \\
\hline
\end{tabular}

\end{document}

[yoyoimut]

I got a nice solution from "CV Radhakrishnan" using nested tabular as follows:

Code: Select all

\documentclass{article} 
\usepackage{multirow,longtable,array} 
 
\begin{document} 
 
\begin{tabular}{|*{2}{c@{}|@{}}} 
\hline 
\parbox[c][1cm]{5cm}{Description}  
& \parbox[c][1cm]{5cm}{~~~Formula}\\\hline 
$\displaystyle \int_a^b f(x)\, 
     \textrm{d}x=F(b)-F(a)$ 
&\begin{tabular}{@{}l@{}} 
  \parbox[c][1cm]{5cm}{~~ A } \\\hline 
  \parbox[c][1cm]{5cm}{~~ B } \\\hline 
  \parbox[c][1cm]{5cm}{~~ C } \\ 
 \end{tabular}\\\hline 
\parbox[c][1cm]{5cm}{D} & \parbox[c][1cm]{5cm}{~~~E}\\\hline 
\end{tabular} 
 
\end{document}