Hi Florian,
- Using PGFPlots v1.16 `enlarge x limits` is working fine on both
groupplots.
- The simplest way of getting rid of the both bars as legend image is
to add `area legend` to the ` groupplot` options.
If you need to draw something else, have a look at section 4.9.5
page 260ff (especially page 262) of the current manual (v1.16)
<http://mirrors.ctan.org/graphics/pgf/contrib/pgfplots/doc/pgfplots.pdf#page=262>
Besides that you maybe have noticed that the `ymin` values are different for
the two plots. Thus I recommend setting `ymin=1` explicitly. This will then
change also the first plot lower part because of your `enlarge y limits`
statement. To make it look similar as before change the given value to
something like 0.01.
Because you haven't stated a MWE, i.e. I don't know which `compat` level you
are using: In case you use a value >1.5 the lower end of the bars will be cut
at 10^0. To avoid this you should also add `log origin=infty` to the
`groupplot` options.
Best regards,
Stefan
PS: I recommend that you in future ask these kind of questions on
<https://tex.stackexchange.com/>
The chance of getting an answer there is much much greater than on this mailing
list.
> -----Original Message-----
> From: Florian Lindner [mailto:mailingli...@xgm.de]
> Sent: Wednesday, January 16, 2019 2:48 PM
> To: pgfplots-features@lists.sourceforge.net
> Subject: [Pgfplots-features] enlarge x limits in groupplot and multiple
> symbols in legend
>
> Hello,
>
> I have a plot, generated from the two tiny data files I have attached. It
> basically works great, with two small issues:
>
> * enlarge x limits seems to have only an effect on the first group plot. I
> also tried putting it in \nextgroupplot[here], but same effect.
>
> * The legend contains two symbols (of the same color) for each entry, like
> "☐ ☐ Filling evaluation". How can I omit the second symbol?
>
> Thanks a lot!
> Florian
>
> \begin{figure}
> \centering
> \ref{leg:TimingsPreallocation}
> \begin{tikzpicture}
> \begin{groupplot}[
> group style={columns=2, y descriptions at=edge left},
> ybar={0cm},
> symbolic x coords={off, compute, save, tree},
> xtick=data,
> xticklabels={No preallocation, Explicitly computed, Computed \&
> saved, Spatial tree},
> /pgf/bar width=9pt,
> enlarge x limits=0.18, enlarge y limits={value=0.3, lower},
> ymode=log,
> ylabel={Time [ms]},
> x tick label style={rotate=30},
> ymax=40000,
> legend entries={Filling evaluation, Preallocation evaluation,
> Filling interpolation, Preallocation interpolation},
> legend to name={leg:TimingsPreallocation}, legend columns=2]
>
> \nextgroupplot
> \addplot+ table[y=fillA]{prealloc-80.csv};
> \addplot+ table[y=preallocA]{prealloc-80.csv};
> \addplot+ table[y=fillC]{prealloc-80.csv};
> \addplot+ table[y=preallocC]{prealloc-80.csv};
>
> \nextgroupplot
> \addplot+ table[y=fillA]{prealloc-100.csv};
> \addplot+ table[y=preallocA]{prealloc-100.csv};
> \addplot+ table[y=fillC]{prealloc-100.csv};
> \addplot+ table[y=preallocC]{prealloc-100.csv};
> \end{groupplot}
> \end{tikzpicture}
> \end{figure}
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