[Tex/LaTex] Tikz matrix arrows alignment

horizontal alignmenttikz-matrixtikz-pgf

I have a problem that I cannot solve for myself.

The following code produces the following image, which I do not really like.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix, arrows}
\usepackage{amssymb}

\begin{document}

\begin{center}
\begin{tikzpicture}
  \matrix (m) [matrix of math nodes, row sep=0em, column sep=4em, minimum width=2em]
  { 0 & \mathbb{Z}\times\mathbb{Z} & \mathbb{Z}^2          & 0 \\
      & (\alpha_0, \alpha_1)       & (-\alpha_0, \alpha_1) &   \\
      &                            & \beta_{01}            & 0 \\ };
\path[>=stealth, ->]
    (m-1-1.east|-m-1-2) edge node [above] {\scriptsize$d_{-1}$} (m-1-2.west|-m-1-2)
    (m-1-2.east|-m-1-2) edge node [above] {\scriptsize$d_{ 0}$} (m-1-3.west|-m-1-2)
    (m-1-3.east|-m-1-2) edge node [above] {\scriptsize$d_{ 1}$} (m-1-4.west|-m-1-2);
\path[>=stealth, |->]
    (m-2-2.east|-m-2-2) edge (m-2-3.west|-m-2-2);
\path[>=stealth, |->]
    (m-3-3.east|-m-3-3) edge (m-3-4.west|-m-3-3);
\end{tikzpicture}
\end{center}


\end{document}

Old

What I want to achieve is having arrows aligned, more or less as in the following image

New

Does someone have some hint?
I prefer to use tikz, but any other package can be welcome.

Best Answer

Unless you use TiKZ for some other reason. There is no need to use it to obtain your diagram.

With help from "The Comprehensive LaTeX symbols list" (for \xrightarrow and \xmapsto) and egreg's answer to Make box with minimum width (in math mode) (for \minwidthbox) is possible to write:

\documentclass{article}
\usepackage{amsmath,amssymb,empheq,mathtools}

\DeclareRobustCommand{\minwidthbox}[2]{%
  \ifmmode
    \expandafter\mathmakebox
  \else
    \expandafter\makebox
  \fi
  [\ifdim#2<\width\width\else#2\fi]{#1}%
}

\begin{document}

\[
\begin{array}{ccccccc}
0 & \xrightarrow{\minwidthbox{d_{-1}}{3em}}    
   & \mathbb{Z}\times\mathbb{Z}
   & \xrightarrow{\minwidthbox{d_0}{3em}} 
   & \mathbb{Z}^2 
   & \xrightarrow{\minwidthbox{d_1}{3em}} 
   & 0 \\
   &  
   & (\alpha_0,\alpha_1) 
   & \xmapsto{\minwidthbox{}{3em}} 
   & (-\alpha_0,\alpha_1) 
   & 
   & \\
   & 
   & 
   & 
   & \beta_{01} & \xmapsto{\minwidthbox{}{3em}}  & 0 
\end{array}
\]
\end{document}

which produces

enter image description here

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

[Tex/LaTex] Numerical conditional within tikz keys

I am definitely unfamiliar with both beamer and tikz (do not quite get what the \only are supposed to do) but perhaps this could go in the direction you want:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{chains}
\newcounter{count}

% helper macro:
\long\def\GobToSemiColon #1;{}

\newcommand\myPicture{
\begin{tikzpicture}
  \begin{scope}[start chain = going below]
  \ifnum\value{count}<1 \expandafter\GobToSemiColon\fi
  \ifnum\value{count}>3 \expandafter\GobToSemiColon\fi
  \node[draw, rectangle, on chain] {display only when counter is between
    1 and 3};

  \ifnum\value{count}>-1 \expandafter\GobToSemiColon\fi
  \node[draw, rectangle, on chain] {display only when counter is
    negative}; 

  \ifnum\value{count}<100 \expandafter\GobToSemiColon\fi
  \ifnum\value{count}>200 \expandafter\GobToSemiColon\fi  
  \node[draw, rectangle, on chain] {display only if counter is between
    100 and 200};

  \ifnum\value{count}<3 \expandafter\GobToSemiColon\fi
  \ifnum\value{count}>20 \expandafter\GobToSemiColon\fi
  \node[draw, circle, on chain] {only when counter is in the range 3 to 20};
  \end{scope}
\end{tikzpicture}
}

\begin{document}
\begin{frame}
\only{\setcounter{count}{-3}\myPicture}
\only{\setcounter{count}{105}\myPicture}
\only{\setcounter{count}{39}\myPicture}
\only{\setcounter{count}{2}\myPicture}
\only{\setcounter{count}{5}\myPicture}
\end{frame}
\end{document}

beamer

Best Answer

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

[Tex/LaTex] Numerical conditional within tikz keys

Related Question