Show coordinates on axis

Question

How can I show the coordinates of the listed points on a Pgfplots log-log diagram?

Also, how can I label each graph given by a table with a different name?

\begin{tikzpicture}
\begin{axis}[
xmode=log, 
ymode=log, 
xlabel=Processors, 
ylabel=Speedup
]
\addplot table {
1 1
2 1.99892449476752
4 3.96674166623464
8 7.88161642065569
16 15.4344468776274
32 12.4017223883252
64 24.0354227021333
};
\addplot table {
1 1
2 1.99804684248206
4 5.34549214847199
8 7.94496112836762
16 15.7551224031058
32 22.774653408508
64 40.4820003069663
};
\addplot table {
1 1
2 2.00359505426647
4 3.87681649751088
8 7.94921166729328
16 15.7830470707627
32 28.9132497101297
64 56.1481274839776
};
\addplot table {
1 1
2 1.99397507855784
4 3.98192544925128
8 7.98048783262623
16 15.8061179993891
32 30.4545364844811
64 59.9506057736665
};
\end{axis}
\end{tikzpicture}

Here is an example on the coordinates marked in the x axis:

Ideally something similar should be achieved in the y axis but I'm not sure if the points are two close it will be difficult to make the difference.

Are you after some version of nodes near coords? As for the labeling, I don't really understand what you mean at all. — Torbjørn T., Nov 02 '22 at 18:35
@TorbjørnT. the diagram plots different tables, the idea is put a name to each of the graphs representing these tables. — user1868607, Nov 02 '22 at 19:59
@TorbjørnT. nodes near coords seems to show points on the graph, I want the points on the axis themselves — user1868607, Nov 02 '22 at 20:06
For the labeling, sounds like you're after a legend. For example add \legend{a,b,c,d} inside the axis environment, and possibly legend pos=north west in the axis options. See manual for details. For the other, perhaps I'm slow, but how exactly do you want this to look? Perhaps a quick sketch made in Paint or similar would help. — Torbjørn T., Nov 02 '22 at 21:55
@TorbjørnT. I added an example with the coordinates marked on the x axis. — user1868607, Nov 03 '22 at 08:27

Jasper Habicht · Accepted Answer · 2022-11-03T09:14:48.010

I don't know whether there exists an easier way than that suggested in this nice answer, but using this approach you can do:

\documentclass[border=10pt]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.18}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
xmode=log, 
ymode=log, 
xlabel=Processors, 
ylabel=Speedup,
xtick={data},
xticklabel={%
    \pgfkeys{/pgf/fpu=true}%
    \pgfmathparse{exp(\tick)}%
    \pgfmathprintnumber[fixed relative, precision=3]{\pgfmathresult}%
    \pgfkeys{/pgf/fpu=false}%
},
]
\addplot table {
1 1
2 1.99892449476752
4 3.96674166623464
8 7.88161642065569
16 15.4344468776274
32 12.4017223883252
64 24.0354227021333
};
\addplot table {
1 1
2 1.99804684248206
4 5.34549214847199
8 7.94496112836762
16 15.7551224031058
32 22.774653408508
64 40.4820003069663
};
\addplot table {
1 1
2 2.00359505426647
4 3.87681649751088
8 7.94921166729328
16 15.7830470707627
32 28.9132497101297
64 56.1481274839776
};
\addplot table {
1 1
2 1.99397507855784
4 3.98192544925128
8 7.98048783262623
16 15.8061179993891
32 30.4545364844811
64 59.9506057736665
};
\end{axis}
\end{tikzpicture}
\end{document}

Show coordinates on axis

1 Answers1