Simple 1D plot using tikz

Question

Trying to draw a 1D plot, some dots over one X axis. Currently, I have:

\begin{tikzpicture}
\begin{axis}[
xmin=0, xmax=22,
axis x line=bottom,% only show the bottom x axis
hide y axis,    
scatter/classes={%
    a={mark=o,draw=black}}
]

\addplot[scatter,only marks,
    mark size = 3pt,
    fill = red,
    scatter src=explicit symbolic]
table {
3 0 
6 0 
9 0 
12 0 
15 0 
18 0 
    };
\end{axis}

\end{tikzpicture}

unfortunately, the circles doesn't appears over (superposed) the x-axis. This is what I see:

Any hint or some solution more simple?

The circles appears over the line of the X-axis (that is, superposed to it)? — pasaba por aqui, Nov 05 '16 at 16:18
@Dan: sorry, but no change in the result after adding ymin=0. — pasaba por aqui, Nov 05 '16 at 16:32
Use the axis lines=middle option in \begin{axis} as per pgfplots: how make axes go through origin? — Dai Bowen, Nov 05 '16 at 16:38
@Dan, with ymax=5 things goes even worst, the circles dissapears. — pasaba por aqui, Nov 05 '16 at 16:41
@DaiBowen: perfect, now circles appears over the line, as expected. Thanks a lot. Do you want it as answer or write a community answer in order to close the issue? — pasaba por aqui, Nov 05 '16 at 16:42
@pasabaporaqui it's the same answer as the question I linked to (you can see that more obviously in your MWE if you comment out the hide y axis instruction) so personally I think this question is best closed as a duplicate of that one. — Dai Bowen, Nov 05 '16 at 16:45
@DaiBowen: oops, sorry for the duplicate (but I can promise I passed long time googling for the answer). Deleting this question in 4, 3, 2, ... — pasaba por aqui, Nov 05 '16 at 16:48
@pasabaporaqui not at all, it's not obviously a duplicate and I think even if marked as a duplicate there's good reason to not delete the question as it's coming at the same problem from a very different angle. — Dai Bowen, Nov 05 '16 at 16:50

score 3 · Answer 1 · answered Nov 05 '16 at 16:46

3

You need to add a y minimum and maximum.

Code:

\documentclass{amsart}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
\begin{axis}[
    xmin=0, xmax=22,
    axis x line=bottom,% only show the bottom x axis
    hide y axis,    
    ymin=0,ymax=5,
    scatter/classes={%
        a={mark=o,draw=black}}
    ]

\addplot[scatter,only marks,
    mark size = 3pt,
    fill = red,
    scatter src=explicit symbolic]
table {
3 0 
6 0 
9 0 
12 0 
15 0 
18 0 
    };
\end{axis}

\end{tikzpicture}

\end{document}

This yields:

answered Nov 05 '16 at 16:46

Dan

3,699

2

The problem with this solution is it produces a lot of empty space over the line. – pasaba por aqui Nov 05 '16 at 17:00
You can make it take up less empty space over the line by, e.g., adding y=0.2cm, after the ymin=0,ymax=5, line. – liwoxa Jun 25 '23 at 10:30

Simple 1D plot using tikz

1 Answers1