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I want to create the following picture in LaTeX. How can I do this?enter image description here

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You can also start searching for on this site –  percusse Apr 27 at 12:42
    
which site exactly? How can i search something like this in this site?! –  tanha Apr 27 at 12:52
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@tanha, on the top, there is a search field. See the black bar on the top. –  Sigur Apr 27 at 12:52
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How to create Toeplitz matrix in Latex ? –  tanha Apr 28 at 8:14

3 Answers 3

up vote 3 down vote accepted

Hope this will serve as a starting point for the OP to learn. Here the proposal uses array where you specifies how many columns you need, for example, by using cccc for 4 columns centered, and then separate each column by & and ends the line by \.

enter image description here

Code

\documentclass[12pt]{article}
\usepackage[margin=1cm,paper size={15cm,8cm}]{geometry}
\usepackage{amsmath,amssymb}
\thispagestyle{empty}
\begin{document}

\[
\begin{array}{lccccccccccccc}
m:              &   &   & 0 & 0 & 0 & 0 & 1 &0 &0  & 0 & 0 &  &      \\
d(1)=0          &-1 & 2 & 1 &   &   &   &   &  &   &   &      & &    \\
d(2)=0          &   &   &-1 & 2 & 1 &   &   &  &   &   &   &  &      \\
d(3)=0          &   &   &   &-1 & 2 & 1 &   &  &   &   &      & &    \\
$\ldots\ldots$  &   &   &   &   &   &   & $\ldots$ & & &   &         \\
d(5)=1          &   &   &   &   &   &   &   &$\ldots$  &   &  & & &  \\
$\ldots\ldots$  &   &   &   &   &   &   &   &  & $\ldots$  &  &\\
d(11)=0 & & &   &   &   &   &   &   &   &   & -1   & 2 & 1  \\
\end{array}
\]

\end{document}

Edit: Recommended by barbara beeton, a flush right solution.

enter image description here

Code:

\documentclass[12pt]{article}
\usepackage[margin=1cm,paper size={16cm,8cm}]{geometry}
\usepackage{amsmath,amssymb}
\thispagestyle{empty}
\begin{document}

\[
\begin{array}{lrrrrrrrrrrrrr}
m:     &    &  & 0 & 0 & \phantom{-}0 & \phantom{-}0 & 1 &0 &0 & \phantom{-}0 & 0 &&\\
d(1)=0 &-1  & \phantom{-}2& 1 &   &   &   &   &  &  &   &     && \\
d(2)=0 &    &  &-1   & 2 & 1  &   &   &   &   &  &  &   &        \\
d(3)=0 &    &  &     &-1 & 2  & 1 &   &   &   &  &  &   &        \\
$\ldots\ldots$ &     &   &    &   &   &   &  $\ldots$&  &     && \\
d(5)=1 &    &  &     &   &    &   &   &$\ldots$  &  &   &     && \\
$\ldots\ldots$ &     &   &    &   &   &   &   &   &  $\ldots$ & &\\
d(11)=0 &   &  &     &   &    &   &   &   &   &  & -1 & \phantom{-}2 & \phantom{-}1  \\
\end{array}
\]

\end{document}
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since some of the entries in the cells are negative, i'd be inclined to set the columns flush right rather than centered. –  barbara beeton Apr 27 at 19:24
    
Noted and added, thanks for the tips. –  Jesse Apr 27 at 22:16
    
How to create Toeplitz matrix in Latex ? –  tanha Apr 28 at 8:15

The hardest part is getting equal sized columns:

\documentclass{article}
\usepackage{array,collcell}
\newcommand{\two}[1]{\makebox[1.5em][r]{$#1$}}
\newcommand{\Ldots}{\dots\dots\hspace*{-1em}}

\begin{document}
\[
\setlength{\arraycolsep}{0pt}
\begin{array}{l @{\quad} *{13}{>{\collectcell\two}c<{\endcollectcell}}}
\quad m & & & 0 & 0 & 0 & 0 & 1 & 0 & 0 & 0 & 0 \\[1ex]
d(1)=0  & -1 & 2 &  1 \\
d(2)=0  &    &   & -1 & 2 &  1 \\
d(3)=0  &    &   &    &   & -1 & 2 & 1 \\
\dots   &    &   &    &   &    & \Ldots \\
d(5)=1  &    &   &    &   &    &   &  & \Ldots \\
\dots   &    &   &    &   &    &   &  &  &  & \Ldots \\
d(11)=0 &    &   &    &   &    &   &  &  &  &  & -1 & 2 & 1
\end{array}
\]
\end{document}

enter image description here

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the dotted entries in the columns to the right appear in the original to "join" two columns rather than be centered on just one column. maybe \mathllap from the rightmost affected column would produce that result. –  barbara beeton Apr 27 at 19:27

You could use two array environments, with the second one containing thirteen columns, and use \phantom instructions in the first row of the second array to get equal-width columns. If you want the "dots" placed on the baseline instead of centered vertically, use \dots instead of \cdots.

enter image description here

\documentclass{article}
\begin{document}
$\begin{array}{@{}l}
m:\\
d(1)=0\\
d(2)=0\\
d(3)=0\\
\cdots\\
d(5)=0\\
\cdots\\
d(11)=0
\end{array}
\quad
\setlength\arraycolsep{2pt} % default value: 5pt
\begin{array}{*{13}{r}}
\phantom{-0} & \phantom{-0} 
& \phantom{-}0 & \phantom{-}0 & \phantom{-}0 & \phantom{-}0 
& \phantom{-}1 
& \phantom{-}0 & \phantom{-}0 & \phantom{-}0 & \phantom{-}0
& \phantom{-0} & \phantom{-0} \\
-1 & 2 & 1\\
& & -1 & 2 & 1\\
& & & -1 & 2 & 1\\
& & & & \multicolumn{3}{c}{\cdots}\\
& & & & & \multicolumn{3}{c}{\cdots}\\
& & & & & & & \multicolumn{3}{c}{\cdots}\\
& & & & & & & & & & -1 & 2 & 1\\
\end{array}$
\end{document}
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