Hi Christian That works beautifully (see attached example pdf) - thanks!
Cheers
Will
On Tue, Jan 31, 2012 at 3:38 PM, Christian Feuersaenger
<cfeuersaen...@googlemail.com> wrote:
> Hi William,
>
> Am 28.01.2012 17:47, schrieb William Henney:
>
>> The only thing missing now is some way to take per-point values from a
>> data column for the "/pgfplots/nodes near coords align" parameter
>> ("above", "below", "left", etc). That would help in avoiding
>> collisions between the labels and would allow me to use a larger font
>> size. Is it at all possible?
>
>
> Yes, it is - and it is rather simple as well: you can modify your data table
> such that it contains a further column 'align'.
> Then, you tell pgfplots that the visualization depends on its data -- in the
> very same way as you included the 'lambda' column. Once your data table is
> modified, you can add the following two lines to make it happen:
>
> nodes near coords align=\ALIGN,
> visualization depends on={value\thisrow{align} \as \ALIGN},
>
> Here, the 'value\thisrow{align} \as\ALIGN' means to take the expanded value
> of \thisrow{align} verbatim, i.e. without parsing it as a number. Without
> the key word 'value', it would have been parsed as number.
>
> NOTE: you need to change you data table's column name for (M-O)/E : it
> should not contain white spaces (since the default column separator is white
> space).
>
> Here is a complete example:
>
> Cloudy El lambda Model Observed Error M/O (M-O)/E
> align
> NE_3 Ne3 3869 8.17686723274 10.80 1.4 0.76 -1.87
> below
> S_II S2 4070 10.4475816855 8.227 0.979 1.27 2.27
> above
> S_II S2 4078 2.99580775427 2.698 0.318 1.11 0.94
> auto
> C__2 C2 4267 0.207606269471 0.191 0.051 1.09 0.33
> below
> TOTL O3 4363 2.37236800689 2.011 0.207 1.18 1.75
> auto
> HE_1 He1 4471 4.65171605379 4.3 0.416 1.08 0.85 auto
> FE_3 Fe3 4659 2.60331622015 0.338 0.042 7.70 53.94
> auto
> FE_3 Fe3 4702 1.44123467401 0.198 0.052 7.28 23.91
> auto
> FE_3 Fe3 4734 0.756129700232 0.117 0.036 6.46 17.75
> auto
> FE_3 Fe3 4755 0.47606006097 0.069 0.028 6.90 14.54
> {anchor=south west}
> H__1 H1 4861 100.0 100 7.2 1.00 0.00 auto
> O__3 O3 4959 85.6877662453 80.94 5.91 1.06 0.80 auto
> O__3 O3 5007 257.917681537 232.7 16.2 1.11 1.56 auto
> N__2 N2 5755 8.17735206821 5.91 0.65 1.38 3.49 auto
> HE_1 He1 5876 14.5187752486 14.48 1.35 1.00 0.03
> auto
> O__1 O1 6300 5.4711813156 4.846 0.446 1.13 1.40 auto
> S__3 S3 6312 5.1304323418 3.88 0.357 1.32 3.50 auto
> H__1 H1 6563 280.747361832 286 21.5 0.98 -0.24 auto
> N__2 N2 6584 33.6017794459 33.84 2.54 0.99 -0.09
> auto
> HE_1 He1 6678 3.78215599287 3.514 0.316 1.08 0.85
> auto
> S_II S2 6731 0.637016569893 0.747 0.067 0.85 -1.64
> auto
> AR_3 Ar3 7135 26.2075170797 17.01 1.48 1.54 6.21
> auto
>
> Note that even the complicated choice {anchor=south west} is possible here.
> This should allow all freedom that you need.
>
> \documentclass{article}
> \usepackage{fullpage}
> \usepackage{txfonts}
> \usepackage{pgfplots}
>
> \newcommand\Ion[2]{\ensuremath{\mathrm{#1\,\scriptstyle #2}}}
> \newcounter{ionstage}
> \newcommand{\ion}[2]{% replace the aastex version
> \setcounter{ionstage}{#2}%
> \Ion{#1}{\Roman{ionstage}}}
>
> % \usepgfplotslibrary{external}
> % \tikzset{external/force remake}
> % \tikzexternalize
>
> \pgfplotsset{
> compat=1.5.1, % most current version as of writing (27 Jan 2012)
> % compat=newest, % select to always use latest version (may cause minor
> appearance changes)
> width=\textwidth,
> }
> \begin{document}
> \begin{tikzpicture}
> \begin{loglogaxis}[
> xlabel={Observed Intensity, \(100 \times
> I_{\lambda}/I(\mathrm{H}\beta)\)},
> ylabel={Model Intensity, \(100 \times I_{\lambda}/I(\mathrm{H}\beta)\)},
> log ticks with fixed point,
> legend columns=4,
> legend pos=north west,
> % transpose legend,
> ]
> \addplot [
> scatter/classes={
> H1={mark=*,brown},%
> He1={mark=*,green},%
> C2={mark=triangle*,black},%
> N2={mark=triangle*,cyan},%
> O1={mark=*,orange},%
> O3={mark=square*,orange},%
> Ne3={mark=square*,blue},%
> S2={mark=triangle*,red},%
> S3={mark=square*,red},%
> Ar3={mark=square*,magenta},%
> Fe3={mark=square*,yellow}%
> },
> only marks, scatter,
> scatter src=explicit symbolic,
> point meta=explicit symbolic,
> nodes near coords*={\tiny\pgfmathprintnumber[set thousands
> separator={}]\LAMBDA\,\AA},
> visualization depends on={\thisrow{lambda} \as \LAMBDA},
> nodes near coords align=\ALIGN,
> visualization depends on={value\thisrow{align} \as \ALIGN},
>
> error bars/x dir=both,
> error bars/x explicit,
> error bars/y dir=none,
> ] table [
> x=Observed,
> y=Model,
> x error=Error,
> meta=El
> ] {ratios-177341.dat};
> \addlegendentry{\ion{H}{1}}
> \addlegendentry{\ion{He}{1}}
> \addlegendentry{\ion{C}{2}}
> \addlegendentry{[\ion{N}{2}]}
> \addlegendentry{[\ion{O}{1}]}
> \addlegendentry{[\ion{O}{3}]}
> \addlegendentry{[\ion{Ne}{3}]}
> \addlegendentry{[\ion{S}{2}]}
> \addlegendentry{[\ion{S}{3}]}
> \addlegendentry{[\ion{Ar}{3}]}
> \addlegendentry{[\ion{Fe}{3}]}
> \label[Ne3]{marker:Ne3}
> \addplot [gray,domain=0.2:300] {x};
> \end{loglogaxis}
> \end{tikzpicture}
>
> The marker for [\ion{Ne}{3}] is \ref{marker:Ne3}
>
> \end{document}
>
>
> Best regards
>
> Christian
--
Dr William Henney, Centro de Radioastronomía y Astrofísica,
Universidad Nacional Autónoma de México, Campus Morelia
ratios-figure-figure10.pdf
Description: Adobe PDF document
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