[OS X TeX] Vertical Spacing in "bmatrix" environment

[Michael Hoppe]

Am 12.11.2008 um 11:34 schrieb Themis Matsoukas:
> \[
> \renewcommand{\arraystretch}{2}
> \begin{bmatrix}
>  \frac{s+5}{s^2+5s+4} \\
>  \frac{-1}{s^2+5s+4}
> \end{bmatrix}
> \]

The brackets are too big.  Compare all solutions listed so far:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{amsmath}
\def\tabkor{\vphantom{\Bigl(}}
\begin{document}
\Huge
$$\begin{bmatrix}
   \tabkor\frac{s+5}{s^2+5s+4} \\
   \tabkor\frac{-1}{s^2+5s+4}
\end{bmatrix}
$$

$$\begin{bmatrix}
   \frac{s+5}{s^2+5s+4} \\
   \frac{-1}{s^2+5s+4}
\end{bmatrix}
\begin{bmatrix}
   \frac{s+5}{s^2+5s+4} \\
   \noalign{\smallskip}
   \frac{-1}{s^2+5s+4}
\end{bmatrix}
$$

$$
  \begin{bmatrix}
     \frac{s+5}{s^2+5s+4} \\[2ex]
     \frac{-1}{s^2+5s+4}
  \end{bmatrix}
\renewcommand{\arraystretch}{2}
\begin{bmatrix}
  \frac{s+5}{s^2+5s+4} \\
  \frac{-1}{s^2+5s+4}
\end{bmatrix}
$$
\end{document}

You might want to use \dfrac instead of \frac; then define

     \def\dtabkor{\vphantom{\biggl(}}

and use it like this:

$$\begin{bmatrix}
   \dtabkor\dfrac{s+5}{s^2+5s+4} \\
   \dtabkor\dfrac{-1}{s^2+5s+4}
\end{bmatrix}
$$


Michael