[Tex/LaTex] How to draw flowchart-Diagram with text

diagramstikz-pgf

\documentclass{article}

%\usepackage[latin1]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows} % For flowchart and Diagram

%%%<
\usepackage{verbatim}
\usepackage[active,tightpage]{preview}  % For flowchart and Diagram
\PreviewEnvironment{tikzpicture}  % For flowchart and Diagram
\setlength\PreviewBorder{60pt}% to control size of the diagram, to reduce increase +ve value
%%%>

\begin{document}
\pagestyle{empty}

Text here

% Define block styles
\tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=2.5cm,minimum height=2em]
\tikzstyle{io} = [trapezium, trapezium left angle=70, trapezium right angle=110,minimum height=2em,text centered, draw=black, fill=blue!30]
\tikzstyle{decision} = [diamond, draw, fill=blue!20, text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]
\tikzstyle{block} = [rectangle, draw, fill=blue!20, text width=5em, text centered, rounded corners, minimum height=4em]
  \tikzstyle{line} = [draw, -latex']  
\begin{tikzpicture}[node distance = 2cm, auto]
    % Place nodes
    \node [io] (init) {Initialize};
    \node [cloud, above of=init] (Start) {Start};
    \node [cloud, right of=init] (system) {system};
    \node [block, below of=init] (identify) {Process};
    \node [block, below of=identify] (evaluate) {Evaluate};
    \node [block, left of=evaluate, node distance=3cm] (update) {update model};
    \node [decision, below of=evaluate] (decide) {Decision};
    \node [cloud, below of=decide, node distance=3cm] (Stop) {Stop};
    % Draw edges
    \path [line] (init) -- (identify);
    \path [line] (identify) -- (evaluate);
    \path [line] (evaluate) -- (decide);
    \path [line] (decide) -| node [near start] {yes} (update);
    \path [line] (update) |- (identify);
    \path [line] (decide) -- node {no}(Stop);
    \path [line,dashed] (Start) -- (init);
    \path [line,dashed] (system) -- (init);
    \path [line,dashed] (system) |- (evaluate);
\end{tikzpicture}


\end{document}

This gives

enter image description here

I want to draw this diagram with description. But this produces dragram only ignoring other text in the same document. How can I do the wok I wat?

Best Answer

If I understand properly, you may want remove these lines

\usepackage[active,tightpage]{preview}  % For flowchart and Diagram
\PreviewEnvironment{tikzpicture}  % For flowchart and Diagram
\setlength\PreviewBorder{60pt}% to control size of the diagram, to reduce increase +ve value

These lines are meant to produce a tight picture, not to be used in a regular document. Without these lines your code:

\documentclass{article}
\usepackage{lipsum}
%\usepackage[latin1]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows} % For flowchart and Diagram

%%%<
\usepackage{verbatim}
%\usepackage[active,tightpage]{preview}  % For flowchart and Diagram
%\PreviewEnvironment{tikzpicture}  % For flowchart and Diagram
%\setlength\PreviewBorder{60pt}% to control size of the diagram, to reduce increase +ve value
%%%%>

\begin{document}
\pagestyle{empty}

Text here

% Define block styles
\tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=2.5cm,minimum height=2em]
\tikzstyle{io} = [trapezium, trapezium left angle=70, trapezium right angle=110,minimum height=2em,text centered, draw=black, fill=blue!30]
\tikzstyle{decision} = [diamond, draw, fill=blue!20, text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]
\tikzstyle{block} = [rectangle, draw, fill=blue!20, text width=5em, text centered, rounded corners, minimum height=4em]
  \tikzstyle{line} = [draw, -latex']
\begin{tikzpicture}[node distance = 2cm, auto]
    % Place nodes
    \node [io] (init) {Initialize};
    \node [cloud, above of=init] (Start) {Start};
    \node [cloud, right of=init] (system) {system};
    \node [block, below of=init] (identify) {Process};
    \node [block, below of=identify] (evaluate) {Evaluate};
    \node [block, left of=evaluate, node distance=3cm] (update) {update model};
    \node [decision, below of=evaluate] (decide) {Decision};
    \node [cloud, below of=decide, node distance=3cm] (Stop) {Stop};
    % Draw edges
    \path [line] (init) -- (identify);
    \path [line] (identify) -- (evaluate);
    \path [line] (evaluate) -- (decide);
    \path [line] (decide) -| node [near start] {yes} (update);
    \path [line] (update) |- (identify);
    \path [line] (decide) -- node {no}(Stop);
    \path [line,dashed] (Start) -- (init);
    \path [line,dashed] (system) -- (init);
    \path [line,dashed] (system) |- (evaluate);
\end{tikzpicture}
\lipsum

\end{document}

enter image description here

Notes:

Use \tikzset instead of \tikzstyle which is deprecated.
Use positioning library and use below=of, right = of syntax for better placement (instead of below of=).

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

[Tex/LaTex] Line up nested tikz enviroments or how to get rid of them

As is explained in How do I draw shapes inside a tikz node? pics can be used for defining new objects. My main problem using pics is how to place where you want because they aren't nodes and positioning them is not so easy.

Following code shows how to define EDFA block.

    EDFA/.pic={
        \begin{scope}[scale=.5]
        \draw (-1,0) coordinate (in) --  (-1,1) -- (1,0) coordinate (out) --  (-1,-1) -- cycle;
        \node[anchor=north,inner sep=2pt] at (0,-1) {$1$};
        \end{scope}

In this case, coordinate (-1,0) will act as west anchor and 1,0 as east. Both point will have an special name for further reference. Every pic is placed according its own origin (0,0). You can use Claudio's answer to Anchoring TiKZ pics for better positioning.

As your example was simple, I'd prefer to star with EDFA and place Source and Sink after it.

\documentclass[]{article}

% tikz
\usepackage{tikz}
\usetikzlibrary{positioning} %relative positioning

\begin{document}

\tikzset{%
    EDFA/.pic={
        \begin{scope}[scale=.5]
        \draw (-1,0) coordinate (in) --  (-1,1) -- (1,0) coordinate (out) --  (-1,-1) -- cycle;
        \node[anchor=north,inner sep=2pt] at (0,-1) {$1$};
        \end{scope}
    }
}

\begin{tikzpicture}[
block/.style={draw},
]

\draw pic (edfa) {EDFA};

\node[block, left=of edfain] (source) {Source};

\node[block, right= of edfaout] (sink) {Sink};

\draw[->] (source) -- (edfain);
\draw[->] (edfaout) -- (sink);

\end{tikzpicture}

\end{document}

I understand that your components are more complex than EDFA because for this particular case an isosceles triangle node with a label will do the work and it can be used as a node and not as a pic:

\documentclass[]{article}

% tikz
\usepackage{tikz}
\usetikzlibrary{positioning} %relative positioning
\usetikzlibrary{shapes.geometric}

\begin{document}

\begin{tikzpicture}[
    block/.style={draw},
    edfa/.style={isosceles triangle, minimum width=1cm, 
         draw, anchor=west, isosceles triangle stretches, 
         minimum height=1cm, label=-80:#1}
]

\node[block] (source) {Source};

\node[edfa=1, right=of source] (edfa) {};

\node[block, right= of edfa] (sink) {Sink};

\draw[->] (source) -- (edfa);
\draw[->] (edfa) -- (sink);

\end{tikzpicture}

\end{document}

Best Answer

Notes:

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

[Tex/LaTex] Line up nested tikz enviroments or how to get rid of them

Related Question