[Tex/LaTex] Adjust the distance between one pair of blocks in block diagram

blockdiagrams

I want to move only the second block near to the third block so that variables between first and second block are clearly seen. Other parts of block diagram should be kept the same. I have attached the output as .png image and the code is below

\documentclass[english]{IEEEtran}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage{float}
\usepackage{amsbsy}
\usepackage{graphicx}
\usepackage{babel}
\makeatletter
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,shadows}
\usepackage{amsmath}
\usepackage{amssymb}
\makeatother

\usepackage{babel}
\begin{document}
\begin{figure}[H]
\tikzstyle{block} = [draw, rectangle, minimum height=3em, minimum width=3em]
\tikzstyle{output} = [coordinate]
\begin{tikzpicture}[auto, node distance=2.2cm,>=latex']
%placing the blocks
\node[text width=5em] [block] (node1) {ZC sequence generation $u,v,N_{cs}$};
\node[text width=3em] [block, right of=node1] (node2) {point point point };
\node[text width=2em] [block, right of=node2] (node3) {taking inverse};
\node[text width=4em] [block, right of=node3] (node4) {up filter sam};
\node[text width=5em] [block, below of=node4] (node5) {Add PP};
\node[text width=4em] [block, left of=node5] (node6) {Shifty Res Blo};
\node [output, left of=node6] (output) {};
%\node[dspnodeopen,dsp/label=above,left of=node6] (node7) {Tx}; 
%connecting the blocks
\draw (0.98,0)--(1,0)[draw,->] (node1) -- node {$z_{u,v}(n)$} (node2);
\draw[-> ] (node2) -- (node3);
\draw[-> ] (node3) -- (node4);
\draw[-> ] (node4) -- (node5);
\draw[-> ] (node5) -- (node6);
\draw[-> ] (node6) -- node [name=Tx] {Tx}(output);  
%\draw[-> ] (node6) -- (node7);
\end{tikzpicture}\caption{\label{transmitter_block_diagram}transmission}
\end{figure}
\end{document

Best Answer

Placing nodes relative to one another is better done with the help of positioning library. Add \usetikzlibrary{positioning} and change all of = to = of. Then adjust the node distance (which I kept as 1.3cm).

\documentclass[english]{IEEEtran}
\usepackage{babel}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,shadows,positioning}


\usepackage{babel}
\begin{document}
\begin{figure}[htb]%[H]
\tikzstyle{block} = [draw, rectangle, minimum height=3em, minimum width=3em]
\tikzstyle{output} = [coordinate]
\begin{tikzpicture}[auto, node distance=1.3cm,>=latex']
%placing the blocks
\node[text width=5em,block] (node1) {ZC sequence generation $u,v,N_{cs}$};
\node[text width=3em,block, right = of node1] (node2) {point point point };
\node[text width=2em,block, right = of node2] (node3) {taking inverse};
\node[text width=4em,block, right = of node3] (node4) {up filter sam};
\node[text width=5em,block, below = of node4] (node5) {Add PP};
\node[text width=4em,block, left = of node5] (node6) {Shifty Res Blo};
\node [output, left = of node6] (output) {};
%\node[dspnodeopen,dsp/label=above,left of=node6] (node7) {Tx};
%connecting the blocks
\draw (0.98,0)--(1,0)[draw,->] (node1) -- node {$z_{u,v}(n)$} (node2);
\draw[-> ] (node2) -- (node3);
\draw[-> ] (node3) -- (node4);
\draw[-> ] (node4) -- (node5);
\draw[-> ] (node5) -- (node6);
\draw[-> ] (node6) -- node [name=Tx] {Tx}(output);
%\draw[-> ] (node6) -- (node7);
\end{tikzpicture}%
\caption{\label{transmitter_block_diagram}transmission}
\end{figure}
\end{document}

Remember that positioning library is more accurate in relative positioning.

Related Solutions

[Tex/LaTex] Drawing rectilinear curves in Tikz, aka an Etch-a-Sketch drawing

\draw (20,12) -- ++(2,0) -- ++(0,2) -- ++(-3,0) -- ++(45:3);

Use ++ before each new incremental coordinate to make it relative to the last one and put the pencil there.

Here's a complete example:

\documentclass{article}
\usepackage{tikz}
\begin{document}
\tikz\draw (20,12) -- ++(2,0) -- ++(0,2) -- ++(-3,0) -- ++(30:3) {[rounded corners=10pt]-- ++(5,0) -- ++(0,-6)} -- ++(-7,0) -- cycle;
\end{document}

Of course, combining this with the -| or |- path operators can simplify the code even further; the following two pieces of code produce the same result:

\tikz\draw (20,12) -- ++(2,0) -- ++(0,2) -- ++(3,0) -- ++(0,1) -- ++(1,0) -- ++(0,-3) -- ++(2,0);\par\bigskip

and

\tikz\draw (20,12) -| ++(2,2) -| ++(3,1) -- ++(1,0) |- ++(2,-3);

I don't think that defining commands in this case adds anything; in fact, I think it reduces the functionality of the existing syntax (which is already simple). The example demonstrates that you can use, for example, polar coordinates and modify (up to TikZ limitations) the path attributes midways; even if the current question doesn't require this, it's a good thing to have the possibility to do those kind of modification if they are required.

[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

Related Solutions

[Tex/LaTex] Drawing rectilinear curves in Tikz, aka an Etch-a-Sketch drawing

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

Related Question