mirror of
https://github.com/MartinThoma/LaTeX-examples.git
synced 2025-04-26 06:48:04 +02:00
33 lines
1.2 KiB
TeX
33 lines
1.2 KiB
TeX
\documentclass{article}
|
|
\usepackage[pdftex,active,tightpage]{preview}
|
|
\setlength\PreviewBorder{2mm}
|
|
|
|
\usepackage{amssymb,amsmath}
|
|
\usepackage{pgfplots}
|
|
|
|
\begin{document}
|
|
\begin{preview}
|
|
\begin{tikzpicture}
|
|
\begin{axis}[
|
|
axis lines=middle,
|
|
width=15cm, height=15cm, % size of the image
|
|
grid = both,
|
|
grid style={dashed, gray!30},
|
|
enlargelimits=true,
|
|
xmin=-1, % start the diagram at this x-coordinate
|
|
xmax= 1, % end the diagram at this x-coordinate
|
|
ymin= 0, % start the diagram at this y-coordinate
|
|
ymax= 1, % end the diagram at this y-coordinate
|
|
/pgfplots/xtick={-1,-0.8,...,1}, % make steps of length 0.2
|
|
/pgfplots/ytick={0,0.1,...,1}, % make steps of length 0.1
|
|
axis background/.style={fill=white},
|
|
ylabel=y,
|
|
xlabel=x,
|
|
legend style={at={(0.8,0.8)}, anchor=north}]
|
|
\addplot[domain=-1:1, ultra thick,samples=100,red] {1};
|
|
\addplot[domain=-1:1, ultra thick,samples=100,blue] {0};
|
|
\legend{$1 \text{, if } x \in \mathbb{Q}$, $0 \text{, if } x \in \mathbb{R} \setminus \mathbb{Q}$}
|
|
\end{axis}
|
|
\end{tikzpicture}
|
|
\end{preview}
|
|
\end{document}
|