Based on the answer of Stefan Pinnow in 'How to group several charts into one chart?', I tried to generate a diagram with multiple grouped data. Therefore, I modified the diagram but I have some problems. The resulting diagram now looks:
And here is my MWE (I hope it is as minimal as possible MWE):
% restructured data file:
% - 'n' values are sorted ascending
% - added column 'z' to know which data belong to which measurement
% - added a dummy line at the end of each data set to produce an empty entry
% for the separation of the blocks
% - put all data in one file
\begin{filecontents}{data.txt}
z n val1 val2 val3
10 0.1 6 10 400.0
10 1.0 9 70 300.0
10 10.0 10 120 100.0
10 {} {} {} {}
20 0.1 10 80 500.0
20 1.0 15 95 600.0
20 10.0 20 140 690.0
20 {} {} {} {}
30 0.1 15 100 450.0
30 1.0 18 200 700.0
30 10.0 28 260 850.0
30 {} {} {} {}
40 0.1 13 300 1500.0
40 1.0 19 260 1300.0
40 10.0 21 220 1000.0
40 {} {} {} {}
50 0.1 25 250 3000.0
50 1.0 37 180 2400.0
50 10.0 34 100 2000.0
\end{filecontents}
\documentclass[border=0pt]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{patterns}
\pgfplotsset{
compat=newest,
scale only axis,
ymajorgrids=true,
tick align = outside,
yticklabel style={
/pgf/number format/fixed zerofill,
/pgf/number format/precision=1,
},
legend style={
text=black,
legend pos=north west,
legend cell align={left},
},
}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
color=black,
% set the `width' of the plot to the maximum length ...
width=\textwidth,
% ... and use half this length for the `height'
height=0.5\textwidth,
scale only axis,
/pgf/number format/.cd,
use comma,
1000 sep={\,},
ymin=-0.5,
ymax=30.5,
ytick={0.0, 5.0, ..., 30.0},
% use `data' for the positioning of the `xticks' ...
xtick=data,
% ... and use table data for labeling the `xticks'
xticklabels from table={data.txt}{n},
% add extra ticks "at the empty entries to add the vertical lines
extra x ticks={3,7,11,15},
% this ticks shouldn't be labeled ...
extra x tick labels={},
% ... but grid lines should be drawn without the tick lines
extra x tick style={
grid=major,
major tick length=0pt,
},
xlabel={X Axis 1 Label},
ylabel={Y Axis 1 Label},
ylabel style={blue},
y axis line style={blue},
ytick style={blue},
yticklabel style=blue,
xtick pos=bottom,
axis y line*=left,
% because of the category labels, shift the `xlabel' a bit down
xlabel style={
yshift=-4ex,
},
% ... and with that you also have to adjust the x limits
enlarge x limits={abs=1},
% set `clip mode' to `individual' so the category labels aren't clipped away
clip mode=individual,
]
% plot the "blue" points
\addplot [
color=blue,
only marks,
mark size=2pt,
mark=square*,
mark options={solid,fill=blue},
] table [
% use just the `coordindex' as x coordinate,
% the correct labeling is done with `xticklabels from table'
x expr=\coordindex,
y=val1,
] {data.txt};
\label{label-plot1}
% add the category labels
\begin{scope}[
% because the reference point will be the lower axis line the
% labels have to be moved a bit more down to don't overlap with
% the `xticklabels'
every label/.append style={
label distance=3ex,
},
]
\node [label=below:{System A}]
at (axis cs:1,\pgfkeysvalueof{/pgfplots/ymin}) {};
\node [label=below:{System B}]
at (axis cs:5,\pgfkeysvalueof{/pgfplots/ymin}) {};
\node [label=below:{System C}]
at (axis cs:9,\pgfkeysvalueof{/pgfplots/ymin}) {};
\node [label=below:{System D}]
at (axis cs:13,\pgfkeysvalueof{/pgfplots/ymin}) {};
\node [label=below:{System E}]
at (axis cs:17,\pgfkeysvalueof{/pgfplots/ymin}) {};
\end{scope}
\end{axis}
% Frame 2
\begin{axis}[
color = red,
% set the `width' of the plot to the maximum length ...
width=\textwidth,
% ... and use half this length for the `height'
height=0.5\textwidth,
scale only axis,
/pgf/number format/.cd,
use comma,
1000 sep={\,},
ymin=-5.0,
ymax=305.0,
ytick={0.0, 50.0, ..., 300.0},
% use `data' for the positioning of the `xticks' ...
xtick=data,
% ... and use table data for labeling the `xticks'
xticklabels from table={data.txt}{n},
% add extra ticks "at the empty entries to add the vertical lines
extra x ticks={3,7,11,15},
% this ticks shouldn't be labeled ...
extra x tick labels={},
% ... but grid lines should be drawn without the tick lines
extra x tick style={
grid=major,
major tick length=0pt,
},
ylabel={Y Axis 2 Label},
% because of the category labels, shift the `xlabel' a bit down
xlabel style={
yshift=-4ex,
},
ytick style={red},
axis x line*=none,
axis y line*=right,
ylabel style = red,
% ... and with that you also have to adjust the x limits
enlarge x limits={abs=1},
% set `clip mode' to `individual' so the category labels aren't clipped away
clip mode=individual,
hide x axis
]
% plot the "red" points
\addplot [
color=red,
only marks,
mark size=2pt,
mark=triangle*,
mark options={solid,fill=red}
] table [
x expr=\coordindex,
y=val2,
] {data.txt};
\label{label-plot2}
\end{axis}
% Frame 3
\begin{axis}[
color = green,
% set the `width' of the plot to the maximum length ...
width=\textwidth,
% ... and use half this length for the `height'
height=0.5\textwidth,
scale only axis,
/pgf/number format/.cd,
use comma,
1000 sep={\,},
ymin=-50,
ymax=3050.,
ytick={0, 500, ..., 3000},
% use `data' for the positioning of the `xticks' ...
xtick=data,
% ... and use table data for labeling the `xticks'
xticklabels from table={data.txt}{n},
% add extra ticks "at the empty entries to add the vertical lines
extra x ticks={3,7,11,15},
% this ticks shouldn't be labeled ...
extra x tick labels={},
% ... but grid lines should be drawn without the tick lines
extra x tick style={
grid=major,
major tick length=0pt,
},
ylabel={Y Axis 3 Label},
% because of the category labels, shift the `xlabel' a bit down
xlabel style={
yshift=-4ex,
},
ylabel style = green,
ytick style={green},
axis x line*=none,
axis y line*=right,
% ... and with that you also have to adjust the x limits
enlarge x limits={abs=1},
% set `clip mode' to `individual' so the category labels aren't clipped away
clip mode=individual,
hide x axis,
every outer y axis line/.style={
green,
xshift=2.0cm
},
every tick/.style={
green,
xshift=2.0cm
},
every y tick label/.append style={
green,
xshift=2.0cm
},
]
% plot the legend
\addlegendimage{refstyle=label-plot1} \addlegendentry{ \color{blue}{Algorithm A}}
\addlegendimage{refstyle=label-plot2} \addlegendentry{ \color{red}{Algorithm B} }
\addlegendimage{refstyle=label-plot3} \addlegendentry{ \color{green}{Algorithm C} }
% plot the "green" points
\addplot [
color=green,
only marks,
mark size=2pt,
mark=diamond*,
mark options={solid,fill=green},
] table [
x expr=\coordindex,
y=val3,
] {data.txt};
\label{label-plot3}
\end{axis}
\end{tikzpicture}
\end{document}
My problems/ questions are:
- The last data set of System E is not vizualized fully. How can I solve this?
- There is some miss arrangement of the data point on the x-axis. What I am doing wrong?
- There is some miss alignment of the data points of 'Algorithm B' and 'Algorithm C' regarding the correlation to 'Algorithm A' and the x-axis. Do you have a hint to solve this?
- I would also like to write a multi-line text as column caption with defined line breaks. In contrast to 'System A' there should be 'System A \n \n Parameter: \n \alpha=5 \n beta=3 \n \lambda=8'. Using of newline (\n) is not working. Can you give me a hint for that?
- Is it possible to draw interconnection lines (for instance: a dotted line) between the points (here: 0.1 , 1.0, 10.0) of one group (here grouped by color: 'Algorithm A') within another grouping (here: grouped by system, for instance 'System A'), but not to draw interconnection lines between groups (here: between the systems)?
