Graphics, Figures & Tables ⇒ problem with creating flow chart

[cat123]

I'm trying to make a flow chart similar / the same as in that PNG image.

I tried with following but it didn't go well
Can somebody please help me or give me some advice how to begin? Thanks in advance.

Code: Select all

\begin{tikzpicture}[node distance=2 cm,auto,>=latex']
    \node [int, pin={[init]above:$\mu$}] (a) {$S$};
    \node (b) [left of=a,node distance=2cm, coordinate] {a};
    \node [int, pin={[init]above:$\mu$}] (c) [right of=a] {$I$};
    \node [coordinate] (end) [right of=c, node distance=2cm]{};
    \path[->] (b) edge node {$a$} (a);
    \path[->] (a) edge node {$v$} (c);
    \draw[->] (c) edge node {$p$} (end) ;
\end{tikzpicture}

[Stefan Kottwitz]

Welcome to the forum!

If you would post a minimal working example, it would be much easier. The code doesn't contain the styles int and init, so it brings errors.

The drawing is not difficult, I can take a look tomorrow (here it's after midnight), perhaps post the missing styles in the meantime.

Stefan

[Stefan Kottwitz]

Here is a start. I used a loop with the fancy TikZ syntax for counting and evaluating, to not repeat commands for nodes and edges so much.

Code: Select all

\documentclass[border=80pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows, positioning}
\tikzset{
   rect/.style = { draw, minimum width = 2em, minimum height = 2ex },
  label/.style = { font=\scriptsize },
}
\begin{document}
\begin{tikzpicture}[
    node distance = 1cm, auto, >=latex',
    nodes = { execute at begin node=$,
              execute at end   node=$ },
  ]
  \coordinate (0);
  \foreach \txt/\label [ count=\current,
      evaluate = \current as \previous using int(\current-1) ]
      in {S/\mu,I/\beta,R/\alpha,C/\delta} {
    \node [rect, right = of \previous] (\current) {\txt};
    \draw [->] (\previous) -- node [label] {\label} (\current);
    \draw [->] (\current)  -- node [label] {\mu} ++(0,1);
  }
  \draw [->] (4) to ++(0,-1) -| node [label, near end] {\gamma} (1);
\end{tikzpicture}
\end{document}

flowchart.png (7.47 KiB) Viewed 3823 times

Stefan

[cat123]

Thank you very much )