LaTeX Forum

% Das ist mein LaTeX-Dokument.
\documentclass[12pt,a4paper]{article}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}
\usepackage{tikz} 		% Kopf- und Fusszeile, Grid (auch Farbe und Grafik)


\begin{document}
Phasenabschnittsteuerung\\
\begin{center}
\begin{tikzpicture}[
x=0.3cm, y=1cm,  scale=1.0, 
font=\footnotesize,
>=latex   %Voreinstellung für Pfeilspitzen
]

% Gitternetzlinien
%\draw[xstep=1.2cm, ystep=0.8cm, line width=0.1mm, color=lightgray] (0,-2.25) grid (42.25,2.25);

% x-Achse
\draw[->] (-0,0) -- (35,0) node[below] {$t$}; 
%Zahlen auf x-Achse
\foreach \x in {10,20,...,30}
\draw[shift={(\x,0)},color=black] (0pt,2pt) -- (0pt,-2pt) node[below] {};

% y-Achse 
\draw[->] (0,-2.5) -- (0,2.5) node[left] {$U$};

\draw[thick,color=gray, line width = 0.5pt, dotted] plot[samples=500, domain=0:3.18*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\draw[thick,color=gray, line width = 0.5pt, dotted] plot[samples=500, domain=3.18*pi:6.37*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\draw[thick,color=gray, line width = 0.5pt, dotted] plot[samples=500, domain=6.37*pi:9.55*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\draw[thick,color=gray, line width = 0.5pt, dotted] plot[samples=500, domain=9.55*pi:10.5*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\node[] at (25, -1.75) {\footnotesize \textcolor{black}{50\,\% Helligkeit}};
\draw[line width = 1pt, blue] (10,0) -- (5,0); 
\draw[line width = 1pt, blue] (5,0) -- (5,2); 
\draw[thick,color=gray, line width = 1pt, blue] plot[samples=500, domain=0*pi:1.57*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\draw[line width = 1pt, blue] (20,0) -- (15,0); 
\draw[line width = 1pt, blue] (15,0) -- (15,-2); 
\draw[thick,color=gray, line width = 1pt, blue] plot[samples=500, domain=3.18*pi:4.75*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\draw[line width = 1pt, blue] (30,0) -- (25,0); 
\draw[line width = 1pt, blue] (25,0) -- (25,2); 
\draw[thick,color=gray, line width = 1pt, blue] plot[samples=500, domain=6.36*pi:7.93*pi] 
(\x,{2*sin((0.1*pi)*\x r)});
\end{tikzpicture}
\end{center}


\end{document}
% Ende des Dokumentes 

\documentclass[tikz]{standalone}
\usetikzlibrary{backgrounds}
\begin{document}
\begin{tikzpicture}[
x=0.3cm, y=1cm,  scale=1.0, 
font=\footnotesize,
>=latex   %Voreinstellung für Pfeilspitzen
]
\def\kurve{plot[samples=100, domain=0*pi:1.57*pi] (\x,{2*sin((0.1*pi)*\x r)}) -- (5,0) -- (10,0) -- plot[samples=100, domain=3.18*pi:4.75*pi] (\x,{2*sin((0.1*pi)*\x r)}) -- (15,0) -- (20,0) -- plot[samples=100, domain=6.36*pi:7.93*pi] (\x,{2*sin((0.1*pi)*\x r)}) -- (25,0) -- (30,0)}
\def\hilfs{plot[samples=500, domain=0:10.5*pi] (\x,{2*sin((0.1*pi)*\x r)})}
% x-Achse
\draw[->] (-0,0) -- (35,0) node[below] {$t$}; 
%Zahlen auf x-Achse
\foreach \x in {10,20,30}
\draw[shift={(\x,0)},color=black] (0pt,2pt) -- (0pt,-2pt) node[below] {};
% y-Achse 
\draw[->] (0,-2.5) -- (0,2.5) node[left] {$U$};
\draw[thick,color=gray, line width = 0.5pt, dotted] \hilfs;
\node[] at (25, -1.75) {\footnotesize \textcolor{black}{50\,\% Helligkeit}}; 
\draw[thick,color=gray, line width = 1pt, blue] \kurve;
\begin{scope}[on background layer]
\clip \kurve;
\fill[yellow!50]\hilfs |- cycle;% Füllen der Schnittfläche
\end{scope}
\end{tikzpicture}
\end{document}

\documentclass[tikz]{standalone}
\usetikzlibrary{backgrounds}
\begin{document}
\begin{tikzpicture}[
	x=0.3cm, y=1cm,  scale=1.0, 
	font=\footnotesize,
	>=latex   %Voreinstellung für Pfeilspitzen
]
\def\kurve{plot[samples=100, domain=0*pi:1.57*pi] (\x,{2*sin((0.1*pi)*\x r)}) -- (5,0) -- (10,0) -- plot[samples=100, domain=3.18*pi:4.75*pi] (\x,{2*sin((0.1*pi)*\x r)}) -- (15,0) -- (20,0) -- plot[samples=100, domain=6.36*pi:7.93*pi] (\x,{2*sin((0.1*pi)*\x r)}) -- (25,0) -- (30,0)}
\def\sinus{plot[samples=500, domain=0:10.5*pi] (\x,{2*sin((0.1*pi)*\x r)})}
% x-Achse
\draw[->] (-0,0) -- (35,0) node[below] {$t$}; 
%Zahlen auf x-Achse
\foreach \x in {10,20,30}
\draw[shift={(\x,0)},color=black] (0pt,2pt) -- (0pt,-2pt) node[below] {};
% y-Achse 
\draw[->] (0,-2.5) -- (0,2.5) node[left] {$U$};
\draw[thick,color=red, line width = 0.5pt, dotted] \sinus;
\node at (25, -1.75) {50\,\% Helligkeit};% <- geändert 
\draw[thick,color=gray, line width = 1pt, blue] \kurve;
\begin{scope}[on background layer]
\clip \kurve;
\fill[yellow!50]\sinus |- cycle;% Füllen der Schnittfläche
\end{scope}
\end{tikzpicture}
\end{document}