Draw some circles and arrows

Question

I work with the latex class beamer (\usetheme{Warsaw}). In order to say the area C of mathematics was born from the area A and the area B, I need to draw two circles (area A and area B) in right and left with two arrows comes from them into the third one (area C) that is under and between them. Is there any idea how to draw it?

like http://tex.stackexchange.com/questions/252531/smart-diagram-constellation-diagram-change-direction-of-the-arrows ? — samcarter_is_at_topanswers.xyz, Nov 02 '16 at 16:35
or this http://texblog.org/2015/09/16/drawing-trees-with-tikzpgf-and-lualatex/ ? — samcarter_is_at_topanswers.xyz, Nov 02 '16 at 16:36
Yes, I have been trying the first one before sending my question. But it seems very complicated for me and still have not understand it. — tarl, Nov 02 '16 at 16:51
Can you show us what you have tried? So we don't have to start from scratch? — samcarter_is_at_topanswers.xyz, Nov 02 '16 at 16:52
I use : \begin{frame} \smartdiagramset{ planet size=2cm, distance planet-text=0.1, distance planet-satellite=2.5cm, /tikz/connection planet satellite/.append style={<-} } \smartdiagram[constellation diagram]{ A,B,C }
\end{frame} But the result is B-->A<--C I need B and C at the above of A — tarl, Nov 02 '16 at 17:00

score 3 · Accepted Answer · edited Apr 13 '17 at 12:35

Inspired by https://tex.stackexchange.com/a/283917/36296

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{arrows,positioning,trees} 

\tikzset{
    >=stealth',
    punkt/.style={
        circle,
        draw, 
        fill=blue!30,
        text centered},
    level 1/.style={sibling angle=120, level distance=1cm},
    edge from parent/.style= {draw=none},
}

\begin{document}
\begin{frame}
\begin{tikzpicture}

\coordinate (main) at (0,0) [clockwise from=270]
    child { node[punkt] (1) {A}}
    child { node[punkt] (2) {B}}
    child { node[punkt] (3) {C}}
;

\draw[->] (2) -- (1);
\draw[->] (3) -- (1);

\end{tikzpicture}
\end{frame}
\end{document}

score 2 · Answer 2 · answered Nov 02 '16 at 18:11

2

Another solution:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{arrows,positioning}

\begin{document}
\begin{frame}
    \centering
\begin{tikzpicture}[
    node distance = 14.1 mm and 10 mm,
                > = stealth',
every node/.style = {circle, draw=blue!30!black, fill=blue!30,
                     minimum size=7mm}
                    ]
\node (b) {B};
\node (a) [below right=of b]    {A};
\node (c) [above right=of a]    {C};
%
\draw[->] (b) -- (a);
\draw[->] (c) -- (a);
\end{tikzpicture}
\end{frame}
\end{document}

answered Nov 02 '16 at 18:11

Zarko

296,517

Nice choice of fill colour! :) – samcarter_is_at_topanswers.xyz Nov 02 '16 at 18:13
to be honest, i copy it from your nice answer :-) – Zarko Nov 02 '16 at 18:14
In return I copied the rest of my answer from another question. The colour was the only original thing I contributed :) – samcarter_is_at_topanswers.xyz Nov 02 '16 at 18:15
@tarl, here is usual way to say "thank you" with vote answer and accept this one, which is the best solve your problem :-) – Zarko Nov 03 '16 at 14:43

Draw some circles and arrows

2 Answers2