Tikz. How to draw arcs between nodes?

Question

How to draw arcs. How to add the blue arcs in a simple way?

Or in a simple line with 3 nodes.

I have problem with the final lines

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage[x11names,table]{xcolor}
\usepackage{mathpazo}
\usepackage{tikz}
\usetikzlibrary{calc}% to calculate auxilary coordinates
\newcommand\tikznode[3][]{%
  \tikz[remember picture,baseline=(#2.base)]
    \nodeminimum size=0pt,inner sep=0pt,#1{#3};%
}
\tikzstyle{arrow}=[thick,->,>=stealth]
\tikzstyle{arrowr}=[red,thick,->,>=stealth]
\tikzstyle{arrowg}=[Green4,thick,->,>=stealth]
%
\usetikzlibrary{shapes,snakes}
\begin{document}
\begin{center}
  \begin{tabular}{ccc}
    \tikznode{diasupp}{} & \tikznode{cochupp}{} & \tikznode{mecupp}{} \
    \tikznode{diasup}{} & \tikznode{cochup}{} & \tikznode{mecup}{} \
    \tikznode{dias}{\underline{Días}} & \tikznode{coch}{\underline{Coches}} & \tikznode{mec}{\underline{Mecanicos}} \
    %\midrule
    2 & 5 & 4 \
    8 & 30 & $x$
  \end{tabular}
\end{center}
\begin{tikzpicture}[remember picture,overlay,red,thick]
  \draw [arrowr] (dias) -- (diasupp)--(mecupp)node[midway,sloped,left,rotate=0]{\raisebox{-.0\height}[46pt][50pt]I}--+(mec);
  \draw [arrowg] (coch) -- (cochup)--(mecup)node[midway,sloped,left,rotate=0]{\raisebox{-.0\height}[48pt][52pt]D}--+(mec);
% The next lines is where the trouble is.
  %\path[->] (dias)  edge  [bend left=-20]  node[above] {$1$} (coch);
  %\path[->] (coch)  edge  [bend left=-20]  node[above] {$2$} (mec);
  %\path[->] (dias)  edge  [bend left=-36]  node[above] {$3$} (mec);
\end{tikzpicture}
\end{document}

The trouble caused by -> would be resolved by loading tikz library babel. — muzimuzhi Z, Feb 02 '21 at 00:14

score 3 · Answer 1 · answered Feb 02 '21 at 00:26

Loading tikz library babel will resolve the problem in using \path[->] ...;
Your \tikznode actually is re-implementing utilities in package tikzmark. In general cases, this package is very useful.
In your case, the tikz \matrix command is particularly helpful.

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage[x11names,table]{xcolor}
\usepackage{mathpazo}
\usepackage{tikz}
\usetikzlibrary{babel, matrix, arrows.meta}
\tikzstyle{arrow}=[thick,->,>=stealth]
\tikzstyle{arrowr}=[red,thick,->,>=stealth]
\tikzstyle{arrowg}=[Green4,thick,->,>=stealth]
\begin{document}
\begin{tikzpicture}
  \matrix (table) [matrix of nodes] {
    \underline{Días} & \underline{Coches} & \underline{Mecanicos} \
    2 & 5 & 4 \
    8 & 30 & $x$ \
  };
\draw[arrowr]
    (table-1-1.north) -- ++(0,1) -| node[pos=.25, above] {I} (table-1-3);
  \draw[arrowg]
    (table-1-2.north) -- ++(0,.3) -| node[pos=.25, above] {D} (table-1-3);
  \draw[blue,>={Triangle[scale=.8]}]
    (table-3-1) edge[bend right, ->] (table-3-2)
                edge[bend right=45, ->] (table-3-3)
    (table-3-2) edge[bend right, ->] (table-3-3);
\end{tikzpicture}
\end{document}

Nice. Notice however that there are (still) bugs with spanish babel. The author suggested to use \usepackage[english, spanish, es-noshorthands, shorthands=off]{babel} --- see https://github.com/latex3/babel/issues/38 and https://github.com/latex3/babel/issues/39 (they have been moved, but are still not fixed. Admittedly the second one is difficult to hit, but...) — Rmano, Feb 02 '21 at 08:39
@Rmano Thanks for pointing out that. I do found using every edge/.style={->} is still buggy hence had to use edge[..., ->] in my answer. — muzimuzhi Z, Feb 02 '21 at 18:27

score 2 · Answer 2 · answered Feb 02 '21 at 00:27

Spanish produces an error see here

I fixed it. It should now draw your arrows.

\documentclass[12pt,spanish]{article}
\usepackage{babel}
\usepackage[utf8]{inputenc}
\usepackage[x11names,table]{xcolor}
\usepackage{mathpazo}
\usepackage{tikz}
\usetikzlibrary{babel}
\usetikzlibrary{calc}% to calculate auxilary coordinates
\newcommand\tikznode[3][]{%
  \tikz[remember picture,baseline=(#2.base)]
    \nodeminimum size=0pt,inner sep=0pt,#1{#3};%
}
\tikzstyle{arrow}=[thick,->,>=stealth]
\tikzstyle{arrowr}=[red,thick,->,>=stealth]
\tikzstyle{arrowg}=[Green4,thick,->,>=stealth]
%
\usetikzlibrary{shapes,snakes}
\begin{document}
\begin{center}
  \begin{tabular}{ccc}
    \tikznode{diasupp}{} & \tikznode{cochupp}{} & \tikznode{mecupp}{} \
    \tikznode{diasup}{} & \tikznode{cochup}{} & \tikznode{mecup}{} \
    \tikznode{dias}{\underline{Días}} & \tikznode{coch}{\underline{Coches}} & \tikznode{mec}{\underline{Mecanicos}} \
    %\midrule
    2 & 5 & 4 \
    8 & 30 & $x$
  \end{tabular}
\end{center}
\begin{tikzpicture}[remember picture,overlay,red,thick]
  \draw [arrowr] (dias) -- (diasupp)--(mecupp)node[midway,sloped,left,rotate=0]{\raisebox{-.0\height}[46pt][50pt]I}--+(mec);
  \draw [arrowg] (coch) -- (cochup)--(mecup)node[midway,sloped,left,rotate=0]{\raisebox{-.0\height}[48pt][52pt]D}--+(mec);
% The next lines is where the trouble is.
  \path[->] (dias)  edge  [bend left=-20]  node[above] {$1$} (coch);
  \path[->] (coch)  edge  [bend left=-20]  node[above] {$2$} (mec);
  \path[->] (dias)  edge  [bend left=-36]  node[above] {$3$} (mec);
\end{tikzpicture}
\end{document}

Zarko · Accepted Answer · 2021-02-02T07:37:05.267

You may liked:

Above image is based on your code. Produced is by use of the tikzmark and babe library. Latter solve your.

\documentclass[12pt, spanish]{article}
\usepackage{babel}
\usepackage[x11names,table]{xcolor}
\usepackage{mathpazo}
\usepackage{tikz}
\usetikzlibrary{arrows.meta, 
                quotes,
                tikzmark, 
                babel}
\tikzset{
  arr/.style = {draw=#1, very thick, -Stealth},
arr/.default = blue,
every edge/.style = {arr, bend right=30},
every edge quotes/.style = {font=\small, anchor=center, fill=white, inner sep=1pt}
        }
\begin{document}
    \begin{center}
    \setlength\tabcolsep{12pt}
    \renewcommand\arraystretch{1.5}
\begin{tabular}{@{} ccc @{}}
\tikzmarknode{A}{\underline{Días}} 
    &   \tikzmarknode{B}{\underline{Coches}} 
         &   \tikzmarknode{C}{\underline{Mecanicos}} \
2   &  5 &  4     \
8   & 30 & $x$    \
\end{tabular}
\begin{tikzpicture}[remember picture,overlay]
\draw[arr=red]
        (A) -- ++(0,1.2) -| node[pos=.25, above] {I} (C.60);
\draw[arr=green]
        (B) -- ++(0,0.6) -| node[pos=.25, above] {D} (C.120);
\draw   (A) edge["1"]   (B)
        (B) edge["2"]   (C)
        (A) edge[bend right=45,
                 "3"]   (C);
\end{tikzpicture}
    \end{center}
\end{document}

However, In question you show images of desired result, where blue arrows connect numbers in the last row of tables. It can be produced by:

\documentclass[12pt, spanish]{article}
\usepackage{babel}
\usepackage[x11names,table]{xcolor}
\usepackage{mathpazo}
\usepackage{tikz}
\usetikzlibrary{arrows.meta, 
                quotes,
                tikzmark, 
                babel}
\tikzset{
  arr/.style = {draw=#1, very thick, -Stealth},
arr/.default = blue,
every edge/.style = {arr, bend right=30},
every edge quotes/.style = {font=\small, anchor=center, fill=white, inner sep=1pt}
        }
\begin{document}
    \begin{center}
    \setlength\tabcolsep{12pt}
\begin{tabular}{@{} ccc @{}}
\tikzmarknode{A}{\underline{Días}} 
    &   \tikzmarknode{B}{\underline{Coches}} 
        &   \tikzmarknode{C}{\underline{Mecanicos}} \
2   & 5 &  4     \
\tikzmarknode{D}{8}

    & \tikzmarknode{E}{30} 
        & \tikzmarknode{F}{$x$}    \
\end{tabular}
\begin{tikzpicture}[remember picture,overlay]
\draw[arr=red]
        (A) -- ++(0,1.2) -| node[pos=.25, above] {I} (C.60);
\draw[arr=green]
        (B) -- ++(0,0.6) -| node[pos=.25, above] {D} (C.120);
\draw   (D) edge["1"]   (E)
        (E) edge["2"]   (F)
        (D) edge[bend right=45,
                 "3"]   (F);
\end{tikzpicture}
    \end{center}
\end{document}

which produce:

Tikz. How to draw arcs between nodes?

3 Answers3