Adding a plus symbol in tikz environment

Question

I am in the midst of making a flow chart.

Currently, I have:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric,arrows,amsmath}

\tikzstyle{process}=[rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30]
\tikzstyle{decision}=[diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]

\tikzstyle{arrow}=[thick,->,>=stealth]

    \begin{document}

    \begin{tikzpicture}[node distance=2cm]
        \node (start) [process] {
        $\text{A}_{it}$
        };

        \node (in1) [process, below of=start] {$\text{B}_{it}$};
        \node (in2) [process, below of=in1] {$\text{C}_{it}$};
        \node (pro2) [decision, right of=in1, xshift=2cm] {$\text{ D}_{it}$};
        \draw [arrow] (start)--(pro2);
        \draw [arrow] (in1)--(pro2);
        \draw [arrow] (in2)--(pro2);
    \end{tikzpicture}
    \end{document}

This connects three nodes A, B, C to D.

Now, I wish to create another node, E, to the right of D, but instead of an arrow, I want to add the plus symbol.

Is there any way to do this?

Hey. You'll significantly increase your chances of someone helping you by posting a code snippet that can be compiled (=includes a \documentclass, \begin{document}, etc.). It's just so much easier if we can just copy an paste the code. — sheß, Mar 05 '19 at 17:14
@JouleV I updated the code to include the definitions. Instead of an arrow to the next node to the right, I wish to use an addition symbol instead. This is because I wish to show how a variable is calculated. — ChinG, Mar 05 '19 at 17:22

AndréC · Accepted Answer · 2019-03-05T21:47:50.850

Like this ?

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz,amsmath}
\usetikzlibrary{shapes.geometric,arrows.meta,positioning}

\tikzstyle{process}=[rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30]
\tikzstyle{decision}=[diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]

\tikzstyle{arrow}=[thick,->,>=stealth]

    \begin{document}

    \begin{tikzpicture}[node distance=2cm]
        \node (start) [process] {
        $\text{A}_{it}$
        };

        \node (in1) [process, below of=start] {$\text{B}_{it}$};
        \node (in2) [process, below of=in1] {$\text{C}_{it}$};
        \node (pro2) [decision, right= 2cm of in1] {$\text{ D}_{it}$};
        \node (pro3) [decision, right= 2cm of pro2] {$\text{ E}_{it}$};
        \draw [arrow] (start)--(pro2);
        \draw [arrow] (in1)--(pro2);
        \draw [arrow] (in2)--(pro2);
        \draw (pro2) edge node[draw,fill=white,circle]{+} (pro3);
    \end{tikzpicture}
    \end{document}

addendum

\tikzstyle is deprecated since the version 2.10 of tikz, you must use \tikzset which give :

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz,amsmath}
\usetikzlibrary{shapes.geometric,arrows.meta,positioning}

%\tikzstyle{process}=[rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30]
%\tikzstyle{decision}=[diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30]
%
%\tikzstyle{arrow}=[thick,->,>=stealth]

\tikzset{
    process/.style={rectangle,minimum width=3cm,minimum height=1cm, text centered, draw=black, fill=orange!30},
    decision/.style={diamond,minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=green!30},
        }
    \begin{document}

    \begin{tikzpicture}[node distance=2cm,arrows={-stealth},thick]
        \node (start) [process] { $\text{A}_{it}$ };

        \node (in1) [process, below of=start] {$\text{B}_{it}$};
        \node (in2) [process, below of=in1] {$\text{C}_{it}$};
        \node (pro2) [decision, right= 2cm of in1] {$\text{ D}_{it}$};
        \node (pro3) [decision, right= 2cm of pro2] {$\text{ E}_{it}$};
        \draw [->] (start)--(pro2);
        \draw [->] (in1)--(pro2);
        \draw [->] (in2)--(pro2);
        \draw (pro2) edge node[fill=white]{+} (pro3);
    \end{tikzpicture}
    \end{document}

Yes Andre! Thanks a lot. COuld the plus sign be displayed without the circle? — ChinG, Mar 05 '19 at 18:15
@ChinG simply write \draw (pro2) edge node[fill=white]{+} (pro3) — AndréC, Mar 05 '19 at 18:26
@marmot Till Tantau doesn't think it's that important, why do you think it's crucial? — AndréC, Mar 05 '19 at 19:09
My only request: Please consider stopping to propagate \tikzstyle further. — , Mar 05 '19 at 19:12
https://tex.stackexchange.com/questions/476253/tikz-get-values-for-predefined-dash-patterns-for-grid-in-the-option-help-lines#comment1202208_476253 — , Mar 05 '19 at 19:23
@marmot I hope that the creators of TikZ will protect TikZ from the sacrilege of breaking with TikZ's backwards compatibility. — AndréC, Mar 05 '19 at 19:58

Adding a plus symbol in tikz environment

1 Answers1

addendum