Hi Neal,
three weeks ago (or two!?), I started with an implementation for that
feature. I supposed it would be a very simple addition.
However, it is not. I forgot that there is a hen- and egg problem: you
need the limits in order to fix the unit scaling and you need the unit
scaling in order to write something like
enlarge x limits={abs=1cm} .
My very first draft applies the "abs=1cm" (i.e. enlarge limit by a fixed
dimension) *after* the scaling. In other words: it respects your limit
enlargement, but it does not respect your choice of width/height. I am
unsure of how much time I can invest to implement this in a way which
keeps the axis dimensions fixed.
If you want, you can experiment with that early draft and provide
feedback. I would let you know if the prototype changes its behavior.
The feature is part of the pgfplots unstable currently (available as
download on http://pgfplots.sourceforge.net/ ).
Best regards
Christian
Am 23.08.2012 12:41, schrieb Neal H. Walfield:
> Hi,
>
> I have a very wide plot of some time serie data. In fact, it is so
> wide, that to keep the plot readable, I have to truncate it. This is
> okay, but I'd still like to display as much of the data as possible.
> I can gain some space by shrinking the limits (i.e., enlarge x
> limits). I could set enlarge x to false, but this makes the tick
> marks unreadable, so I'd like to avoid that. Instead, I'd like to
> specify an absolute value in paper dimensions. In particular, I'd
> like to set it to 1.5/pgfplots/ticklength.
>
> I first tried this:
>
> enlarge x limits={abs=1cm}
>
> But, that doesn't work:
>
> ! Package PGF Math Error: Could not parse input '1cm' as a floating
> point number, sorry. The unreadable part was near 'cm'..
>
> pgfplots appears to want the value in axis cs units.
>
> I think that to get this functionality, I'd need a new option to
> enlarge x limits, something along the lines of enlarge x
> limits={paper=dim}.
>
> I'd appreciate any help.
>
> Thanks,
>
> Neal
>
> A minimal working example:
>
> \documentclass{article}
>
> \usepackage{tikz}
> \usepackage{pgfplots}
>
> \begin{document}
>
> \begin{tikzpicture}
> \begin{axis}[small, width=\textwidth, height=.2\textheight]
> \addplot[domain=1:1000] {x};
> \end{axis}
> \end{tikzpicture}
>
> \end{document}
>
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