TeX - LaTeX Asked on August 13, 2020
I would like to plot data with pgfplots that has two interessting x-ranges:
So, to show both ranges appropriately, my idea is to have a single plot which has a linear scale from x = 0 up to x = 300 and a logarithmic scale for the x-axis above.
Additionally, since the first range (linear scale) is more important than the second one (logarithmic scale), it should have a greater width. Let the width-ratio be 3:1.
Here a MWE with a sample of the data to plot. It produces two plots, one with linear scale and another one with logarithmic scale:
documentclass[crop, tikz]{standalone}
usepackage{pgfplots}
usepackage{filecontents}
begin{filecontents*}{sample.csv}
1, 2.42
100, 2.54
200, 2.66
300, 2.75
400, 2.81
1000, 2.94
2000, 2.97
3000, 2.98
5000, 2.99
10000, 3.00
end{filecontents*}
begin{document}
begin{tikzpicture}
begin{axis}[
xlabel=x,
ylabel=y,
xmin = 0,
xmax = 10000,
grid = both],
addplot[line width=1pt,solid,color=cyan, solid] table[col sep=comma]{sample.csv};
end{axis}
end{tikzpicture}
begin{tikzpicture}
begin{semilogxaxis}[
xlabel=x,
ylabel=y,
xmin = 0,
xmax = 10000,
grid = both],
addplot[line width=1pt,solid,color=cyan, solid] table[col sep=comma]{sample.csv};
end{semilogxaxis}
end{tikzpicture}
end{document}
It feels a bit nasty but with groupplots two plots can be aligned side-by-side with different scales.
Using the option horizontal sep = 0
while taking care for the y-axis with axis y line* = left
/ axis y line* = right
leads to a smooth transition to the second plot.
documentclass[crop, tikz]{standalone}
usepackage{pgfplots}
usepackage{filecontents}
usepgfplotslibrary{groupplots}
begin{filecontents*}{sample.csv}
1, 2.42
100, 2.54
200, 2.66
300, 2.75
400, 2.81
1000, 2.94
2000, 2.97
3000, 2.98
5000, 2.99
10000, 3.00
end{filecontents*}
begin{document}
begin{tikzpicture}
begin{groupplot}[group style = {
group size = 2 by 1,
horizontal sep = 0},
width = linewidth,
tick label style={font=footnotesize},
typeset ticklabels with strut,
enlarge x limits=false]
nextgroupplot[
xmin = 0, xmax = 300,
ymin = 2.4, ymax = 3.1,
width = 0.75linewidth, height = 0.75linewidth,
axis y line* = left,
grid = both]
addplot[line width = 1pt, solid, color = cyan] table[col sep = comma] {sample.csv};
nextgroupplot[
xmin = 300, xmax = 10000,
ymin = 2.4, ymax = 3.1,
width = 0.25linewidth, height = 0.75linewidth,
xmode = log,
axis y line* = right,
grid = both,
xtick = {1000, 10000}, yticklabels = {,,}]
addplot[line width = 1pt, solid, color = cyan] table[col sep = comma] {sample.csv};
end{groupplot}
end{tikzpicture}
end{document}
Answered by jonas on August 13, 2020
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