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64 lines
2.3 KiB
TeX
64 lines
2.3 KiB
TeX
\documentclass{article}
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\usepackage[pdftex,active,tightpage]{preview}
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\setlength\PreviewBorder{2mm}
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\usepackage{pgfplots}
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\usepackage{units}
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\pgfplotsset{compat=1.3}% <-- moves axis labels near ticklabels
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% (respects tick label widths)
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\usepackage{tikz}
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\usetikzlibrary{arrows, positioning, calc, intersections, decorations.markings}
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\usepackage{xcolor}
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\definecolor{horizontalLineColor}{HTML}{008000}
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\definecolor{verticalLineColor}{HTML}{FF0000}
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\begin{document}
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% Define this as a command to ensure that it is same in both cases
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\newcommand*{\ShowIntersection}[2]{
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\fill
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[name intersections={of=#1 and #2, name=i, total=\t}]
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[red, opacity=1, every node/.style={above left, black, opacity=1}]
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\foreach \s in {1,...,\t}{(i-\s) circle (2pt)
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node [above left] {\s}};
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}
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\begin{preview}
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\begin{tikzpicture}
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\begin{axis}[
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label distance=0mm,
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width=8cm, height=7cm, % size of the image
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xmin= 40, % start the diagram at this x-coordinate
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xmax= 180, % end the diagram at this x-coordinate
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ymin=60, % start the diagram at this y-coordinate
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ymax=170, % end the diagram at this y-coordinate
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ylabel=y,
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xlabel=x,
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axis lines=left,
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tick style={draw=none},
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xticklabels={,,},
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yticklabels={,,}
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]
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\addplot[name path global=a, domain=55:161, dotted, blue,
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very thick,samples=500, label=$y=f(x)$]
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{113/132078*x*x*x-11865/44026*x*x+1169437/44026*x-93155207/132078};
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% ( 55 | 82.7344) and (161 | 156.011) are on the graph
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\coordinate (b) at (axis cs: 55,170);
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\coordinate (c) at (axis cs:161,170);
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\coordinate (d) at (axis cs:161,82.7344);
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\coordinate (e) at (axis cs:161,156.011);
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\coordinate (a1) at (axis cs:55,111.494);
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\coordinate (a2) at (axis cs:161,111.494);
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\draw[verticalLineColor, thick, <->](a1) -- (a2);
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\draw[verticalLineColor,dashed](b |- 0,0) -- (b);
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\draw[verticalLineColor,dashed](c |- 0,0) -- (c);
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\draw[horizontalLineColor,dashed, thick](d -| 0,0) -- (d);
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\draw[horizontalLineColor,dashed, thick](e -| 0,0) -- (e);
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% (100 | 111.494)
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\coordinate (f) at (axis cs:100, 111.494);
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\draw[red,dashed](f |- 0,0) -- (f);
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\end{axis}
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\end{tikzpicture}
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\end{preview}
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\end{document}
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