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I am trying to create a table using multirow option. I am using the following code:

\documentclass[10pt]{article}
%\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{textcomp}
\usepackage{microtype}
\usepackage{graphicx}
\usepackage{multirow}

\begin{document}
\begin{table}[h]
    \newcommand{\lambdabar}{{\mkern0.75mu\mathchar '26\mkern -9.75mu\lambda}}
    \centering
    \begin{tabular}{r@{=}ll}
        \hline
        \hline
            $a_0$ & $\frac{\hbar^2}{m e^2}$
             & \multirow{2}{7cm}{Bohr (radius of electron orbit in Bohr's model of Hydrogen)} \\ 
              & $5.29\times10^{-9}$ & \\
            $\lambdabar_c$ & $\alpha a_0 = \frac{\hbar}{m c}$
              & \multirow{2}{7cm}{Reduced Compton wavelength ($\lambda_c = \lambda_c/2$). $ \lambda_c $ is change of wavelength of photon scattered at 90\textdegree by a stationary electron due to recoil of electron.} \\ 
               & $3.86159\times10^{-11} $cm & \\
            $ r_0 $ & $\alpha^2 a_0 = \alpha \lambdabar_c = \frac{d^2}{m c^2}$
            &  \multirow{2}{7cm}{Classical radius of electron (size for which electrostatic self energy equals rest mass energy)} \\ 
             & $2.81794\times10^{-13}$cm  & \\
        \hline
        \hline
    \end{tabular} 
\end{table}
\end{document}

And I am getting the following output: enter image description here

Here we can see the last two row coming on the third and fourth row. Why is that happening and how to make it proper?

1

multirow doesn't serve to have more lines in one table cell. for this you should use appropriate type of column, for example p{<column width>} or use tabularx (as i use in example below), tabulary etc. for math stuff is better to declare table column in a way >{$}c<{$} (or other type of column). i hope that example below will some how help you.

\documentclass[10pt]{article}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{textcomp}
\usepackage{tabularx}

\begin{document}
\begin{table}[h]
    \newcommand{\lambdabar}{{\mkern0.75mu\mathchar '26\mkern -9.75mu\lambda}}
    \renewcommand{\tabularxcolumn}[1]{m{#1}}
    \renewcommand{\arraystretch}{1.4}
    \centering
    \begin{tabularx}{\hsize}{>{$}m{4cm}<{$}X}
        \hline
        \hline
a_0=\dfrac{\hbar^2}{m e^2}=5.29\times10^{-9}
            & Bohr (radius of electron orbit in Bohr's model of Hydrogen)   \\
\begin{aligned}
\lambdabar_c  & =\alpha a_0 = \dfrac{\hbar}{m c}\newline\\
              & = 3.86159\times10^{-11}\ \text{cm}
\end{aligned}
            &   Reduced Compton wavelength ($\lambda_c=\lambda_c/2$). $\lambda_c$ is change of wavelength of photon scattered at 90\textdegree by a stationary electron due to recoil of electron.                             \\
\begin{aligned}
r_0 & = \alpha^2 a_0 = \alpha\lambdabar_c = \dfrac{d^2}{m c^2}\\
    & = 2.81794\times10^{-13}\ \text{cm}
\end{aligned}
            &  Classical radius of electron (size for which electrostatic self energy equals rest mass energy)                                        \\
        \hline
        \hline
    \end{tabularx}
\end{table}
\end{document}

enter image description here

1

Here is a TABstacked alternative.

\documentclass[10pt]{article}
%\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{textcomp}
\usepackage{microtype}
\usepackage{graphicx}
\usepackage{multirow}
\usepackage{tabstackengine}
\TABstackMath
\begin{document}
\begin{table}[ht]
  \renewcommand\arraystretch{1.4}
  \setstackgap{L}{1.3\normalbaselineskip}
    \newcommand{\lambdabar}{{\mkern0.75mu\mathchar '26\mkern -9.75mu\lambda}}
    \centering
    \begin{tabular}{lp{2.65in}}
        \hline
        \hline
        {\alignLongunderstack{a_0 =&\frac{\hbar^2}{m e^2}\\
           =&5.29\times10^{-9}}}
        & Bohr (radius of electron orbit in Bohr's model of Hydrogen) \\ 
        {\alignLongunderstack{\lambdabar_c =& \alpha a_0 = \frac{\hbar}{m c}\\
           =&3.86159\times10^{-11} \text{cm}}}
        & Reduced Compton wavelength ($\lambda_c = \lambda_c/2$). 
          $ \lambda_c $ is change of wavelength of photon scattered 
          at 90\textdegree by a stationary electron due to recoil 
          of electron. \\ 
        {\alignLongunderstack{ r_0  =& \alpha^2 a_0 = \alpha \lambdabar_c 
          = \frac{d^2}{m c^2}\\=&2.81794\times10^{-13} \text{ cm}}}
        &  Classical radius of electron (size for which electrostatic 
          self energy equals rest mass energy) \\ 
        \hline
        \hline
    \end{tabular} 
\end{table}

\end{document}

enter image description here

1

The text of the 3rd row (Reduced ...) take 4 lines; not 2. To fix it you can put '\multirow{2}...` and them leave 2 empty lines.

\documentclass[10pt]{article}
%\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{textcomp}
\usepackage{microtype}
\usepackage{graphicx}
\usepackage{multirow}

\begin{document}
\begin{table}[h]
\newcommand{\lambdabar}{{\mkern0.75mu\mathchar '26\mkern -9.75mu\lambda}}
\centering
\begin{tabular}{r@{=}ll}
    \hline
    \hline
        $a_0$ & $\frac{\hbar^2}{m e^2}$
         & \multirow{2}{7cm}{Bohr (radius of electron orbit in Bohr's model of Hydrogen)} \\ 
          & $5.29\times10^{-9}$ & \\
        $\lambdabar_c$ & $\alpha a_0 = \frac{\hbar}{m c}$
          & \multirow{4}{7cm}{Reduced Compton wavelength ($\lambda_c =     \lambda_c/2$). $ \lambda_c $ is change of wavelength of photon scattered at 90\textdegree by a stationary electron due to recoil of electron.} \\ 
           & $3.86159\times10^{-11} $cm & \\
           \\
           \\
        $ r_0 $ & $\alpha^2 a_0 = \alpha \lambdabar_c = \frac{d^2}{m c^2}$
        &  \multirow{2}{7cm}{Classical radius of electron (size for which electrostatic self energy equals rest mass energy)} \\ 
         & $2.81794\times10^{-13}$cm  & \\
    \hline
    \hline
\end{tabular} 
\end{table}
\end{document}

This has the side-effect of having = sign in some rows. I will take them otu from the column specification and put column 1 and 2 in the same.

  • Problem with this is that I will not have much freedom to change things. Like if I change the table size I have to change no of columns and also if I add extra text I have change the no of columns. Anyway thanks for quick reply. – Apurba Nov 19 '13 at 15:43
  • I have found some other solution, I can use perbox to break the lines instead of multirow. – Apurba Nov 21 '13 at 11:51

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