init

tikzgrafiken/function2_1.tex

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+\documentclass{article}
+
+\usepackage[latin1]{inputenc}
+\usepackage{tikz}
+\usetikzlibrary{calc}
+
+
+% GNUPLOT required
+\begin{document}
+\pagestyle{empty}
+
+
+\begin{tikzpicture}
+    \draw[very thin,color=gray] (-0.1,-0.1) grid (3.9,3.9);
+    \draw[->] (-0.2,0) -- (4.2,0) node[right] {$x$};
+    \draw[->] (0,-1.2) -- (0,4.2) node[above] {$f(x)$};
+
+    \foreach \x/\xtext in {1/a,2/b}
+       \draw (\x cm,1pt) -- (\x cm,-1pt) node[anchor=north] {$\xtext$};
+%       \draw [color=red, thin] (1,0) -- (1,1);
+%       \draw [color=red, thin] (2,0) -- (2,1.2599210498948731647672106072782);
+%       \draw [color=red, thin] (1,0) -- (2,0);
+%       \draw  [color=red, thin] plot[id=w3_ausschnitt, smooth, domain=1:2, samples=200] function{x**(1./3.)};
+    %\fill[red] (1,0)  -- plot[id=w3_ausschnitt,domain=1:2,samples=200] function {x**(1./3.)} -- (2,0) -- cycle;
+    \draw [fill=red] (1,0)  -- plot[id=w3_ausschnitt,domain=1:2,samples=200] function {x**(1./3.)} -- (2,0) -- cycle;
+    \draw[color=orange] plot[id=w3, smooth, domain=0:3.5, samples=200] function{x**(1./3.)} node[right] {$f(x) = \sqrt[3]{x}$};
+      %\fill[red!30] (1,0)  -- plot[id=f3,domain=0.658:3,samples=50] function {exp(-x*x*0.5/0.16)} -- (3,0) -- cycle;
+
+    %\pgfmathsetmacro\wert2{\pgfmathpow{1.5}{\pgfmathdivide{1.}{3.}}}
+    %\pgfmathsetmacro\wert2{1.5**0.33333333333}
+
+
+%\pgfmathpow{1.5}{\pgfmathdivide{1.}{3.}}
+
+     \draw [fill=black!50] (1,0) rectangle +(0.5,1);
+%     \draw [fill=black!50] (1.5,0) rectangle +(0.5,(\pgfmathparse{pow(2,7)} \pgfmathresult));
+
+    \pgfmathparse{pow(1.5, (1/3))};
+    \pgfmathsetmacro\wert{\pgfmathresult} %%Die Variable darf keine Zahl in Namen enthalten
+    \draw [fill=black!50] (1.5,0) rectangle +(0.5,\wert);
+
+    % \draw [fill=black!50] (1.5,0) rectangle +(0.5,\pgfmathparse{\pgfmathpow{1.5}{\pgfmathdivide{1.}{3.}}} \pgfmathresult);
+%     \fill [color=black!50] (1.5,0) rectangle +(0.5, 1.1447142425533318678);
+
+\end{tikzpicture}
+
+
+\end{document}