CODEWITHSUNDEEP
latextikz
Dan317
Dan317

Reputation: 621

TikZ - An arc with an arrow

I am learning Tikz and hope somebody can help me achieve the following i.e. I want to draw a directed arc between objects in an equation. Below is a picture of what I am trying to achieve. Arrow in TikZ

I have also attached the code I have used so far:

\documentclass{article}
\usepackage{amsmath,amssymb,braket,tikz}
\usetikzlibrary{tikzmark,calc}

\begin{document}
\begin{tikzpicture}
    $(x+2)(x+3)$
\end{tikzpicture}
\end{document}

I also suspect that there is a way to specify a line or arc, between elements e.g. numbers and letters, without explicitly stating the coordinates. Is this the case? If it were, it would simplify the things I'm trying to achieve.

Any help would be very much appreciated.

Upvotes: 6

Views: 21665

Answers (2)

samcarter_is_at_topanswers.xyz
samcarter_is_at_topanswers.xyz

Reputation: 38913

Another possibility with the tikzmark library:

\documentclass{article}
\usepackage{amsmath,amssymb,braket,tikz}
\usetikzlibrary{tikzmark,calc}

\begin{document}
\begin{equation}
    (\tikzmarknode{a}{x}+2)(\tikzmarknode{b}{x}+3)
\end{equation}
\tikz[remember picture, overlay]{\draw[-latex,red] ([yshift=0.1em]a.north) to[bend left] ([yshift=0.1em]b.north);}
\end{document}

enter image description here

Upvotes: 8

jf_
jf_

Reputation: 3489

The following solution draws an arc above the formula using arc; the actual angles and lengths may have to be adjusted. To get coordinates relative to the formula, the formula is wrapped into the node formula.

\documentclass{article}
\usepackage{amsmath,amssymb,braket,tikz}
\usetikzlibrary{tikzmark,calc}

\begin{document}
\begin{tikzpicture}
    \node (formula) [] {$(x+2)(x+3)$};
    \draw[-latex,red] ($(formula.north west)+(.4,0)$) arc
    [
        start angle=160,
        end angle=20,
        x radius=0.5cm,
        y radius =0.5cm
    ] ;

\end{tikzpicture}
\end{document}

Output:

enter image description here

Upvotes: 8

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