Estoy tratando con una función polinómica, pero el gráfico de TikZ NO es consistente con el resultado de Excel. ¿Cómo puedo solucionar el problema?
Código (Este código es generado por GeoGebra):
\documentclass[a4paper,12pt]{article}
\usepackage{pgf,tikz}
\usetikzlibrary{arrows}
\begin{document}
\definecolor{wqwqwq}{rgb}{0.3764705882352941,0.3764705882352941,0.3764705882352941}
\definecolor{ffffqq}{rgb}{1.,1.,0.}
\definecolor{ffzzqq}{rgb}{1.,0.6,0.}
\definecolor{wwccqq}{rgb}{0.4,0.8,0.}
\definecolor{qqzzqq}{rgb}{0.,0.6,0.}
\definecolor{qqzzff}{rgb}{0.,0.6,1.}
\definecolor{qqqqff}{rgb}{0.,0.,1.}
\definecolor{ffqqqq}{rgb}{1.,0.,0.}
\definecolor{ffdxqq}{rgb}{1.,0.8431372549019608,0.}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=0.45cm,y=5.3cm, scale=0.8]
\draw[->,color=black] (0.,0.) -- (24.,0.);
\foreach \x in {,4, 8, 12, 16, 20}
\draw[shift={(\x,0)},color=black] (0pt,2pt) -- (0pt,-2pt);
\node[below] at (4,0) {\footnotesize 1000};
\node[below] at (8,0) {\footnotesize 1004};
\node[below] at (12,0) {\footnotesize 1008};
\node[below] at (16,0) {\footnotesize 1012};
\node[below] at (20,0) {\footnotesize 1016};
\draw[->,color=black] (0.,0.) -- (0.,1.1);
\foreach \y in {,0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1}
\draw[shift={(0,\y)},color=black] (2pt,0pt) -- (-2pt,0pt) node[left] {\footnotesize $\y$};
\clip(0.,0.) rectangle (24.,1.1);
\draw[line width=1.2pt,color=qqzzff,smooth,samples=100,domain=0.0:24.0] plot(\x,{4.244791666606611E-4*(\x)^(3.0)-0.015178571428663822*(\x)^(2.0)+0.1307440476188998*(\x)+0.2656000000143808});
\draw[line width=1.2pt,color=wwccqq,smooth,samples=100,domain=0.0:24.0] plot(\x,{1.3802083330884915E-4*(\x)^(3.0)-0.005848214285732765*(\x)^(2.0)+0.07114880952747568*(\x)+0.3771999998698159});
\draw[line width=1.2pt,color=ffffqq,smooth,samples=100,domain=0.0:24.0] plot(\x,{6E-5*(\x)^(3.0)-0.0023*(\x)^(2.0)+0.0284*(\x)+0.3408});
\begin{scriptsize}
\draw [fill=qqqqff] (4.,0.571) circle (2.5pt);
\draw [fill=qqqqff] (8.,0.565) circle (2.5pt);
\draw [fill=qqqqff] (12.,0.371) circle (2.5pt);
\draw [fill=qqqqff] (16.,0.218) circle (2.5pt);
\draw [fill=qqqqff] (20.,0.203) circle (2.5pt);
\draw[color=qqzzff] (-1.46,-0.65);
\node [color=qqzzff, right] at (0,0.95) {$y_1= 0.0004x^3 - 1.2835x^2 + 1293.6x -434593$};
\draw [fill=qqzzqq] (4.,0.576) circle (2.5pt);
\draw [fill=qqzzqq] (8.,0.647) circle (2.5pt);
\draw [fill=qqzzqq] (12.,0.621) circle (2.5pt);
\draw [fill=qqzzqq] (16.,0.588) circle (2.5pt);
\draw [fill=qqzzqq] (20.,0.564) circle (2.5pt);
\draw[color=wwccqq] (-1.46,-0.11);
\node [color=wwccqq, right] at (0,0.85) {$y_2 = 0.0001x^3 - 0.4183x^2 + 422.48x - 142243$};
\draw [fill=ffzzqq] (4.,0.42) circle (2.5pt);
\draw [fill=ffzzqq] (8.,0.452) circle (2.5pt);
\draw [fill=ffzzqq] (12.,0.44) circle (2.5pt);
\draw [fill=ffzzqq] (16.,0.436) circle (2.5pt);
\draw [fill=ffzzqq] (20.,0.431) circle (2.5pt);
\draw[color=ffffqq] (-1.46,0.11);
\node [color=ffdxqq, right] at (0,0.75) {\tiny{$y_3 = 5.599\times 10^{-5}x^3 - 0.1696x^2 + 171.26x -57640 $}};
\node [left] at (0, 1.1) {$S_{t}$};
\draw [color=ffqqqq] (9, 0.659)-- ++(-2.0pt,-2.0pt) -- ++(4.0pt,4.0pt) ++(-4.0pt,0) -- ++(4.0pt,-4.0pt);
\node [color=ffqqqq, right] at (9, 0.659) {$(1005, 0.659)$};
\draw [color=ffqqqq] (6, 0.584)-- ++(-2.0pt,-2.0pt) -- ++(4.0pt,4.0pt) ++(-4.0pt,0) -- ++(4.0pt,-4.0pt);
\node [color=ffqqqq, right] at (6, 0.584) {$(1002, 0.584)$};
\end{scriptsize}
\end{tikzpicture} \\
(b) Sea level pressure (hPa) criteria.
\end{document}
Trazar desde Excel:
Salida TikZ
¡Muchas gracias!
Respuesta1
Si usa pgfplots, los gráficos son idénticos.
\documentclass{standalone}
%
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=1.13}
\begin{document}
\begin{tikzpicture}
\begin{axis} [ width=12cm,
xlabel = $x$, ylabel = $y$,
domain = 5:20, no marks, ymin=0
]
\addplot{4.244791666606611E-4*(x)^(3.0)-0.015178571428663822*(x)^(2.0)+
0.1307440476188998*(\x)+0.2656000000143808};
\addplot{1.3802083330884915E-4*(x)^(3.0)-0.005848214285732765*(x)^(2.0)+
0.07114880952747568*(x)+0.3771999998698159};
\addplot{6E-5*(x)^(3.0)-0.0023*(x)^(2.0)+0.0284*(x)+0.3408};
\end{axis}
\end{tikzpicture}
\end{document}
La gráfica:
