mirror of
https://github.com/MartinThoma/LaTeX-examples.git
synced 2025-04-19 11:38:05 +02:00
54 lines
1.5 KiB
TeX
54 lines
1.5 KiB
TeX
\documentclass[border=2pt]{standalone}
|
|
|
|
\usepackage{pgfplots}
|
|
\pgfplotsset{compat=1.16}
|
|
\usepackage{tikz}
|
|
\usepackage{xcolor}
|
|
\definecolor{yellow}{HTML}{cccc00}
|
|
\definecolor{neongreen}{HTML}{00dd00}
|
|
\definecolor{turquoise}{HTML}{00cccc}
|
|
\definecolor{lila}{HTML}{aa00aa}
|
|
|
|
|
|
\begin{document}
|
|
\pgfplotscreateplotcyclelist{mylist}{%
|
|
{yellow},
|
|
{neongreen, densely dashed},
|
|
{turquoise, dashed},
|
|
{blue,densely dotted},
|
|
{lila,dotted},
|
|
{red,loosely dotted},
|
|
{black}}
|
|
\begin{tikzpicture}
|
|
\begin{axis}[
|
|
title=$\chi^2_k$,
|
|
legend style={at={(0.95, 0.95), anchor=north west}},
|
|
axis x line=middle,
|
|
axis y line=middle,
|
|
grid = major,
|
|
width = 16cm,
|
|
height= 9cm,
|
|
grid style={dashed, gray!30},
|
|
domain = 0.01:8,
|
|
restrict y to domain = 0:0.5,
|
|
axis background/.style={fill=white},
|
|
xlabel=$x$,
|
|
ylabel=$f_k(x)$,
|
|
tick align=outside,
|
|
enlargelimits=true,
|
|
every axis plot/.append style={very thick},
|
|
cycle list name=mylist
|
|
]
|
|
\foreach \k in {1, 2, 3, 4, 6, 9} {%
|
|
\addplot+[mark={}] gnuplot[raw gnuplot] {%
|
|
isint(x) = (int(x)==x);
|
|
log2 = 0.693147180559945;
|
|
chisq(x,k)=k<=0||!isint(k)?1/0:x<=0?0.0:exp((0.5*k-1.0)*log(x)-0.5*x-lgamma(0.5*k)-k*0.5*log2);
|
|
set xrange [1.00000e-5:8];
|
|
set yrange [0.00000:0.500000];
|
|
samples=800;
|
|
plot chisq(x,\k)};
|
|
\addlegendentryexpanded{$k = \k$}}
|
|
\end{axis}
|
|
\end{tikzpicture}
|
|
\end{document}
|