Here are the Code examples of this chapter. These pages will be updated over time (sectioning, adding pictures, captions, and possibly further examples). I will synchronize the content with GitHub. Finally, the chapter pages and Code examples will be moved to a dedicated website TikZ.org.
Understanding nodes
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}
\draw (4,2) node[draw, color=red, fill=yellow, text=blue] {TikZ};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{shapes}
\begin{document}
\begin{tikzpicture}
\node (r) at (0,1) [draw, rectangle] {rectangle};
\node (c) at (1.5,0) [draw, circle] {circle};
\node (e) at (3,1) [draw, ellipse] {ellipse};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{shapes}
\begin{document}
\begin{tikzpicture}
\node (r) at (0,1) [draw, rectangle] {rectangle};
\node (c) at (1.5,0) [draw, circle] {circle};
\node (e) at (3,1) [draw, ellipse] {ellipse};
\draw[->] (r.east) -- (e.west);
\draw[->] (r.south) -- (c.north west);
\draw[->] (e.south) -- (c.north east);
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[fill=red] (4,2) circle[radius=0.1];
\node at (4,2) [draw, rectangle] {rectangle};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[fill=red] (4,2) circle[radius=0.1];
\node at (4,2) [draw, rectangle, anchor=south west]
{rectangle};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usepackage{tikzpeople}
\usetikzlibrary{shapes}
\begin{document}
\begin{tikzpicture}
\node (student) [graduate, monitor, minimum size=2cm] {};
\node at (student.45) [starburst, draw=red, fill=yellow,
starburst point height=0.4cm, line width=1pt,
font=\ttfamily\scriptsize, inner sep=1.5pt] {error};
\node at (student.130) [cloud callout, cloud puffs=13, aspect=3,
anchor=pointer, shading=ball, ball color=darkgray,
text=white, font=\bfseries] {My thesis...!};
\end{tikzpicture}
\end{document}
Positioning nodes
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}
\draw circle [fill, radius=2pt] node [anchor=south] {text};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}
\draw circle [fill, radius=2pt] node [above] {text};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}
\node [draw] (TikZ) {TikZ};
\node [draw, right = 0.1cm of TikZ] {PDF};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}
\node [draw] (TikZ) {TikZ};
\node [draw, above right = -0.25cm and 0.1cm of TikZ] {PDF};
\end{tikzpicture}
\end{document}
Labels and Pins
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}[every label/.style = {scale=0.5}]
\node[
label = above:Graphics,
label = left:Design,
label = below:Typography,
label = right:Coding,
circle, shading=ball, ball color=blue!60,
text=white] {TikZ};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}[every pin/.style = {scale=0.5}]
\node[
pin = above:Graphics,
pin = left:Design,
pin = below:Typography,
pin = right:Coding,
circle, shading=ball, ball color=blue!60,
text=white] {TikZ};
\end{tikzpicture}
\end{document}
Images in nodes
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}
\node (router) [inner sep=0pt]
{\includegraphics[width=2cm]{router.pdf}};
\node (switch) [inner sep=0pt, right = of router]
{\includegraphics[width=2cm]{switch.pdf}};
\draw[double] (router) -- (switch);
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}
\node (router) [inner sep=0pt]
{\includegraphics[width=2cm]{router.pdf}};
\node (switch) [inner sep=0pt, right = of router]
{\includegraphics[width=2cm]{switch.pdf}};
\draw[double] (router) --
node [above, font=\scriptsize] {TenGig}
node [font=\tiny, inner xsep=0pt,
below right, at start] {1}
node [font=\tiny,inner xsep=0pt,
below left, at end] {24}
(switch);
\end{tikzpicture}
\end{document}
Aligning text
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}[every node/.style = {inner sep=0pt}]
\node (E) {E};
\node (p) [right = 0pt of E] {p};
\node (i) [right = 0pt of p] {i};
\node (c) [right = 0pt of i] {c};
\node (.) [right = 0pt of c] {.};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}[every node/.style = {inner sep=0pt}]
\node (E) {E};
\node (p) [base right = 0pt of E] {p};
\node (i) [base right = 0pt of p] {i};
\node (c) [base right = 0pt of i] {c};
\node (.) [base right = 0pt of c] {.};
\end{tikzpicture}
\end{document}
Bad alignment:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node[circle, draw, inner sep=2pt] (label) {1};
\end{tikzpicture}
This is the first topic.
\end{document}
Good alignment:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[baseline=(label.base)]
\node[circle, draw, inner sep=2pt] (label) {1};
\end{tikzpicture}
This is the first topic.
\end{document}
Bad picture alignment:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node[circle, draw, inner sep=2pt] (label) {1}
\end{tikzpicture;}
This is the first topic.
\end{document}
Good picture alignment:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[baseline=(label.base)]
\node[circle, draw, inner sep=2pt] (label) {1}
\end{tikzpicture;}
This is the first topic.
\end{document}
Shorter syntax:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\tikz[baseline=(label.base)]{\node[circle, draw, inner sep=2pt] (label) {1};}
This is the first topic.
\end{document}
Extra: source code of figures
\documentclass[tikz,border=5]{standalone}
\usetikzlibrary{positioning}
\tikzset{shape example/.style = {
color=black!50, draw, fill=blue!10,
inner xsep=1.5cm, inner ysep=0.5cm,
}}
\begin{document}
\Huge
\begin{tikzpicture}[node distance = 1mm]
\node[name=n,shape=rectangle,shape example]
{\Huge rectan\smash{g}le\hspace{3cm}node};
\foreach \anchor/\placement in
{center/above, text/below, 45/above right,
mid/right, mid east/right, mid west/left,
base/below, base east/below right, base west/below left,
north/above, south/below, east/above right, west/above left,
north east/above, south east/below, south west/below, north west/above}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt]
{\scriptsize\texttt{(n.\anchor)}};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=5]{standalone}
\usetikzlibrary{positioning}
\tikzset{shape example/.style = {
color=black!50, draw, fill=blue!10,
inner xsep=0.5cm, inner ysep=0.5cm,
}}
\begin{document}
\Huge
\begin{tikzpicture}[node distance = 1mm]
\node[name=n,shape=circle,shape example] {\Huge circle\hspace{2cm}node};
\foreach \anchor/\placement in
{center/above, text/below, 30/above right,
mid/right, mid east/right, mid west/left,
base/below, base east/below right, base west/below left,
north/above, south/below, east/above right, west/above left,
north east/above right, south east/below right, south west/below left,
north west/above left}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt]
{\scriptsize\texttt{(n.\anchor)}};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=5]{standalone}
\usetikzlibrary{shapes}
\tikzset{shape example/.style={
color=black!50, draw, fill=blue!10,
inner xsep=0.5cm, inner ysep=0.5cm,
minimum height=3cm,
}}
\begin{document}
\Huge
\begin{tikzpicture}[node distance = 1mm]
\node[name=n,shape=ellipse,shape example] {\Huge ellipse\hspace{2cm} node};
\foreach \anchor/\placement in
{center/above, text/below, 45/above right,
mid/right, mid east/right, mid west/left,
base/below, base east/below right, base west/below left,
north/above, south/below, east/above right, west/above left,
north east/above, south east/below, south west/below, north west/above}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt] {\scriptsize\texttt{(n.\anchor)}};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=5]{standalone}
\usetikzlibrary{shapes,positioning}
\tikzset{shape example/.style = {
color=black!50, draw, fill=blue!10,
inner xsep=0.5cm, inner ysep=0.5cm,
}}
\begin{document}
\Huge
\begin{tikzpicture}[node distance = 1mm]
\node[name=n,shape=diamond,shape example] {\Huge diamond\hspace{2.6cm}node};
\foreach \anchor/\placement in
{center/above, text/below, 30/above right,
mid/right,
base/below,
north/above, south/below, east/above right, west/above left,
north east/above right, south east/below right, south west/below left,
north west/above left}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt]
{\scriptsize\texttt{(n.\anchor)}};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{calc}
\begin{document}
\begin{tikzpicture}[font={\scriptsize\ttfamily}]
\node[draw,rectangle,outer sep=1cm,inner sep=1cm,color=black!50, draw, fill=blue!10,]
(n) {{\sffamily\Large node n}};
\draw[<->,thick,blue] (n.south)
--++(0,1cm) node[midway,right]{outer sep};
\draw[<->,thick,red] (n.south) ++(0,1cm)
--++(0,1cm)node[midway,right]{inner sep};
\node[,outer sep=0,draw,left,color=black!50, draw, fill=blue!10,]
(m) at(n.west) {{\sffamily\Large node m}};
\draw[<->,blue,thick] (m.east) -- ++(1cm,0) node[midway,above] {outer}
node[midway,below] {sep};
\draw[<->,red,thick] ($(n.west)+(1,0)$) -- ++(1cm,0) node[midway,above] {inner}
node[midway,below] {sep};
\foreach \anchor/\placement in
{south west/below left,south/below,north/above,north west/above left,
north east/above right,south east/below right}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt] {(n.\anchor)};
\foreach \anchor/\placement in
{west/left,south/below,north/above}
\draw[shift=(m.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt] {(m.\anchor)};
\draw[dashed] (n.south west) rectangle (n.north east);
\node[above] at ($(n.center)!0.5!(n.north)$) {shape rectangle};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{calc}
\begin{document}
\begin{tikzpicture}[font={\scriptsize\ttfamily}]
\node[draw,rectangle,outer xsep=1cm,outer ysep=0.5cm,inner xsep=1cm,
inner ysep=0.5cm,color=black!50, draw, fill=blue!10,] (n) {{\sffamily\Large node n}};
\draw[<->,thick,blue] (n.south)
--++(0,0.5cm) node[midway,right]{outer ysep};
\draw[<->,thick,red] (n.south) ++(0,0.5cm)
--++(0,0.5cm)node[midway,right]{inner ysep};
\draw[<->,blue,thick] (n.west) -- ++(1cm,0) node[midway,above] {outer}
node[midway,below] {xsep};
\draw[<->,red,thick] ($(n.west)+(1,0)$) -- ++(1cm,0) node[midway,above] {inner}
node[midway,below] {xsep};
\foreach \anchor/\placement in
{south west/below left,south/below,north/above,north west/above left,
north east/above right,south east/below right}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt] {(n.\anchor)};
\draw[dashed] (n.south west) rectangle (n.north east);
\node[above] at ($(n.center)!0.5!(n.north)$) {shape rectangle};
\end{tikzpicture}
\end{document}
\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{calc}
\newcommand{\n}{\sffamily\Large node n}
\newcommand{\invis}{\phantom{\sffamily\Large node n}}
\begin{document}
\begin{tikzpicture}[font={\scriptsize\ttfamily}]
% node n
\node[draw,circle,outer sep=1cm,inner sep=1cm,color=black!50, draw, fill=blue!10] (n) {{\n}};
% label "shape circle"
\node[above] at ($(n.center)!0.5!(n.north)$) {shape circle};
% dashed helper nodes with same position and (invisible) same text
\node[circle,draw,densely dashed,inner sep=0pt,outer sep=0pt] at (n.center) {\invis};
\node[rectangle,draw,densely dashed,inner sep=0pt,outer sep=0pt] at (n.center) {\invis};
\node (o) [rectangle,draw, dashed,inner sep=1cm,outer sep=0pt] at (n.center) {\invis};
% neighbor node
\node[circle,inner sep=0,outer sep=0,draw,right,color=black!50, draw, fill=blue!10]
(m) at(n.east) {{\sffamily\Large node m}};
% vertical sep
\draw[<->,thick,blue] (n.south)
--++(0,1cm) node[midway,right]{outer sep};
\draw[<->,thick,red] (o.south)
-- ++(0,1cm) node[pos=0.3,right]{inner sep};
% horizontal sep
\draw[<->,red,thick] (o.east) -- ++(-1cm,0)
node[midway,above] {inner} node[midway,below] {sep};
\draw[<->,blue,thick] (m.west) -- ++(-1cm,0)
node[midway,above] {outer} node[midway,below] {sep};
% some anchors
\foreach \anchor/\placement in
{south west/below left,south/below,north/above,north west/above left,
north east/above right,south east/below right,west/left}
\draw[shift=(n.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt] {(n.\anchor)};
\foreach \anchor/\placement in
{east/right,south/below,north/above}
\draw[shift=(m.\anchor)] plot[mark=x] coordinates{(0,0)}
node[\placement,label distance = 0mm,inner sep=3pt] {(m.\anchor)};
% random circle :-)
\draw[dashed] (n.center) circle (3.05cm);
\end{tikzpicture}
\end{document}