Math & Science ⇒ Distance between Matrix Rows with Fractions

[Hrs]

Hi all!

When I compile that:

Code: Select all

\documentclass[a4paper,14pt]{article}
\usepackage{amsmath}

\begin{document}
  \begin{equation}
    \begin{pmatrix}
      {1\over2}&{1\over2}\\
      {1\over2}&{1\over2}
    \end{pmatrix}
  \end{equation}
  \begin{equation}
    \begin{pmatrix}
      \frac{1}{2}&\frac{1}{2}\\
      \frac{1}{2}&\frac{1}{2}
    \end{pmatrix}
  \end{equation}
  $$
    \begin{pmatrix}
      \frac{1}{2}&\frac{1}{2}\\
      \frac{1}{2}&\frac{1}{2}
    \end{pmatrix}
  $$
\end{document}

the distance between rows are very small. How can I easily fix it?

Thank you in advance!

[localghost]

You can stretch the row height.

Code: Select all

\documentclass[11pt,a4paper]{article}
\usepackage{amsmath}

\begin{document}
  \begin{equation*}
    \renewcommand*{\arraystretch}{1.2}
    \begin{pmatrix}
      \frac{1}{2}&\frac{1}{2}\\
      \frac{1}{2}&\frac{1}{2}
    \end{pmatrix}
  \end{equation*}
\end{document}

If you do this globally in the preamble, this will also affect present {array} and {tabular} environments (and perhaps others, too).


Remarks:

• The document class option 14pt is invalid. You should get a corresponding warning. Valid font sizes are 10pt (default), 11pt or 12pt.
• Never ever use $$ … $$ to introduce unnumbered displayed equations. This is TeX syntax and should be replace by \[ … \], which is the correct LaTeX syntax. Furthermore such equations are not affected by the fleqn option for the document class and cause bad spacing (and perhaps other unwanted effects).
• Do not use \over to typeset fractions. This is also TeX syntax and you should receive complaints from amsmath in the log file (*.log). The correct LaTeX2e syntax \frac{}{} is the only way to go.

Further reading:

• The »Math mode« document

Thorsten

[Hrs]

The document class option 14pt is invalid.

Oh, yeah. I just used extsizes package and forgot to change value.

Thanks for this method, but perhaps there is a more neat way to solve this problem?

What if I want to use fraction in fraction? It will be better to "teach" \LaTeX automaticly change height of row depending to size of it's content...

Maybe there is some package to do that?