57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
\begin{tikzpicture}
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[line cap=round,line join=round,x=1cm,y=1cm,scale=1]
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\tikzset{
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every pin/.style={fill=yellow!50!white,rectangle,rounded corners=3pt,font=\tiny},
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small dot/.style={fill=black,circle,scale=0.3},}
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\begin{axis}[
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x=2cm,y=2cm,
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axis lines=middle,
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axis line style = {-latex},
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xmin=-0.5,
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xmax=3,
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ymin=-0.1,
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ymax=2.5,
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ytick=\empty,
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xtick=\empty,
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xlabel=$x$,
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ylabel=$y$,
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extra x ticks = {0.75, 1.25,1.75,2.25},
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extra x tick labels= {$x_0$, $x_3$, $x_2$, $x_1$},
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extra y ticks = {0.71232, 1.22314, 1.55962, 1.81093},
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extra y tick labels= {$g_r$, $f(x_3)$, $f(x_2)$, $f(x_1)$}
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]
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%\addplot[domain=-2.7:-1.1, blue, line width=1,samples=500] {1/(x^2-1)};
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%\addplot[domain=1.1:2.7, blue, line width=1,samples=500] {1/(x^2-1)};
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\addplot[domain=0.75:2.65, blue, line width=1,samples=500] {1+ln(x)};
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\addplot[color=blue, only marks, fill=white] coordinates {(0.75,0.71232)};
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\draw [dashed, blue] (axis cs: 0.75,-0.05) -- (axis cs: 0.75,0.71232);
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\draw [dashed, blue] (axis cs: -0.05,0.71232) -- (axis cs: 0.75,0.71232);
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\addplot[color=blue, only marks] coordinates {(1.25,1.22314)};
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\draw [ blue, thin] (axis cs: 1.25,-0.05) -- (axis cs: 1.25,1.22314);
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\draw [ blue, thin] (axis cs: -0.05, 1.22314) -- (axis cs: 1.25,1.22314);
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\addplot[color=blue, only marks] coordinates {(1.75,1.55962)};
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\draw [ blue, thin] (axis cs: 1.75,-0.05) -- (axis cs: 1.75,1.55962);
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\draw [ blue, thin] (axis cs: -0.05, 1.55962) -- (axis cs: 1.75,1.55962);
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\addplot[color=blue, only marks] coordinates {(2.25,1.81093)};
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\draw [ blue, thin] (axis cs: 2.25,-0.05) -- (axis cs: 2.25,1.81093);
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\draw [ blue, thin] (axis cs: -0.05, 1.81093) -- (axis cs: 2.25,1.81093);
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\end{axis}
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\end{tikzpicture}
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