A scatterplot of the relationship between education and income. The plotted data is from the car R package by John Fox. Note that the data is released under the GPL 2 licence.
| Author: | Ista Zahn |
|---|
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% Author: Ista Zahn
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[only marks, y=.5cm]
\draw plot[mark=*,xshift=-6cm] file {data/ScatterPlotExampleData.data};
\draw[->,xshift=-6cm] (6,0) -- coordinate (x axis mid) (17,0);
\draw[->,xshift=-6cm] (6,0) -- coordinate (y axis mid)(6,27);
\foreach \x in {6,8,10,12,14,16}
\draw [xshift=-6cm](\x cm,1pt) -- (\x cm,-3pt)
node[anchor=north] {$\x$};
\foreach \y/\ytext in {0/0,2.5/5000,5/10000,7.5/15000,10/20000,12.5/25000}
\draw (1pt,\y cm) -- (-3pt,\y cm) node[anchor=east] {$\ytext$};
\node[below=1cm] at (x axis mid) {Education};
\node[left=2cm,rotate=90] at (y axis mid) {Income};
\end{tikzpicture}
\end{document}
Comments
The label on the y axis is not centered on the axis. The code in question is
[left=2cm] moves the reference point 2cm left from (y axis mid) and sets [anchor=east] which then by 90° rotation is positionned north.
To fix it (even if not very intuitive):
The node is first rotated, then in the rotated environment moved 2cm "up" (left) and anchor is set to "south" (east).
Best Claudio
I think it would make sense to change the following line:
\draw[->,xshift=-6cm] (6,0) -- coordinate (y axis mid)(6,27);
for this one:
\draw[->] (0,0) -- coordinate (y axis mid)(0,14);
and remove the option of the tikzpicture "y=0.5cm"
Bye
How can i add a trend line in such a scatterplot?
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