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