Math & Science ⇒ Matrix Alignment of negative Numbers

[Singularity]

Is there an easy way to get this matrix to line up so that the numbers are flush right in each column? As it stands now, the negative numbers "stick out" to the right of the positive numbers.

Code: Select all

\begin{equation*}
	C=
	\begin{pmatrix}
    -4      &  1     &  0 & 0 & 0 & \cdots & 1      \\
     1      & -4     &  1 & 0 & 0 & \cdots & 0      \\
     0      &  1     & -4 & 1 & 0 & \cdots & 1      \\
     \vdots &        &    &   &   & \ddots & \vdots \\
     0      & \cdots &    &   & 1 & -4     &  1     \\
     1      & \cdots &    &   & 0 &  1     & -4
	\end{pmatrix}
,\end{equation*}

Thanks.
-S

[Singularity]

Ah, nevermind. I decided the tabular environment isn't all that hard after all and went with doing it this way

Code: Select all

\documentclass[12pt,fleqn,reqno]{article}
%fleqn: left align equations
%reqno: equation numbers on right
\usepackage{amsmath,amssymb,amsthm}
\usepackage{amsfonts,graphics,epsfig,cite}
\usepackage{array}

\begin{document}
\begin{equation*}
	C=\left(
	\begin{tabular}{>{$}r<{$}>{$}r<{$}>{$}r<{$}>{$}r<{$}>{$}r<{$}>{$}r<{$}>{$}r<{$}}
    -4      &  1     &  0 & 0 & 0 & \cdots & 1      \\
     1      & -4     &  1 & 0 & 0 & \cdots & 0      \\
     0      &  1     & -4 & 1 & 0 & \cdots & 1      \\
     \vdots &        &    &   &   & \ddots & \vdots \\
     0      & \cdots &    &   & 1 & -4     &  1     \\
     1      & \cdots &    &   & 0 &  1     & -4
	\end{tabular}\right)
,\end{equation*}
\end{document}

I like the easy to use bmatrix, pmatrix, etc. environments, so I wanted an easy solution to use with them. But this is easy enough once you get the hang of it.

[localghost]

Code: Select all

\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{mathtools}

\begin{document}
  \[
    C=
    \begin{pmatrix*}[r]
      -4     &  1     &  0 & 0 & 0 & \cdots & 1      \\
      1      & -4     &  1 & 0 & 0 & \cdots & 0      \\
      0      &  1     & -4 & 1 & 0 & \cdots & 1      \\
      \vdots &        &    &   &   & \ddots & \vdots \\
      0      & \cdots &    &   & 1 & -4     &  1     \\
      1      & \cdots &    &   & 0 &  1     & -4
    \end{pmatrix*}
  \]

  \[
    C=\left(
    \begin{array}{@{}*{7}{r}@{}}
      -4     &  1     &  0 & 0 & 0 & \cdots & 1      \\
      1      & -4     &  1 & 0 & 0 & \cdots & 0      \\
      0      &  1     & -4 & 1 & 0 & \cdots & 1      \\
      \vdots &        &    &   &   & \ddots & \vdots \\
      0      & \cdots &    &   & 1 & -4     &  1     \\
      1      & \cdots &    &   & 0 &  1     & -4
    \end{array}
    \right)
  \]
\end{document}

Thorsten