From: Jean-Philippe Rey <jean-philippe.rey@centralesupelec.fr>
To: Hans Hagen <j.hagen@xs4all.nl>
Cc: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: LMTX and addplot table
Date: Sat, 12 Dec 2020 15:35:23 +0100 [thread overview]
Message-ID: <15F67B25-2C61-47FD-B228-809CCC3FAE81@centralesupelec.fr> (raw)
In-Reply-To: <a7af8291-692f-70b2-f5fe-87f60f171435@xs4all.nl>
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> Le 12 déc. 2020 à 13:20, Hans Hagen <j.hagen@xs4all.nl> a écrit :
>
> On 12/12/2020 12:19 PM, Jean-Philippe Rey wrote:
>>> Le 12 déc. 2020 à 11:58, Hans Hagen <j.hagen@xs4all.nl <mailto:j.hagen@xs4all.nl>> a écrit :
>>>
>>> On 12/12/2020 10:36 AM, Jean-Philippe Rey wrote:
>>>> Dear list,
>>>> I am unable to draw a plot using an external file with LMTX. Here is a minimal example
>>>> =====================
>>>> \usemodule[pgfplots]
>>>> \starttext
>>>> \starttikzpicture
>>>> \startaxis
>>>> \addplot table [x=t, y=E] {mfe-addplot.dat};
>>>> \stopaxis
>>>> \stoptikzpicture
>>>> \stoptext
>>>> =====================
>>>> The ConTeXt run fails with an "Undefined control sequence" error (see attached log file). I don't know if this is an LMTX or PGF issue. The example works fine with MkIV. I tried with the tikz version available on ConTeXt garden (pgf 3.0.1, pgfplots 1.16) and the last one from CTAN (pgf 3.1.7a, pgfplots 1.17) with the same result.
>
> wipe t-tikz.* on your machine in order to use m-tikz.mkiv in the distribution because it looks like it does a bad catcode table change ... that went unnoticed because a chardef'd constant gets typeset (and when that happens before \starttext you won't see it but it actually does introduce some funny char); in lmtx we don't use chardef for that so that can give an error then when loading
>
> anyway, you're not suffering from that i think but better use the right module loader anyway
I wiped t-tikz. The only noticeable difference is that now I need to explicitly \usemodule[tikz] in order to use pgfplots. I checked and found the line
\usemodule[t][tikz]
in t-pgfplots.tex. I guess that explains it.
> then you can define the \PackageError macro (I did it with some trial and error but the next seems to work:
>
> \let\PackageError\writestatus
>
> so I'll add something like that to m-tikz.mkiv
As Wolfgang pointed out, \PackageError takes three parameters, the third is meant to be displayed when the user types H to an error prompt. I defined it as
\def/PackageError#1#2#3{\writestatus{#1}{#2 (#3)}}
that effectively displays the error message in the console and the log file.
> which still looks bad but at least you don't crash .. i'll look into that later today (as i'm splitting mkiv/lmtx code i use a slightly different file reader so maybe that's it)
I guess that you've pinpointed the problem.
By default, pgfplotstable breaks lines at white space (tab or space according to the pgfplotstable manual). I used tabs as column separators in my demo file. With MKiV, the columns are correctly split but with LMTX, pgfplotstable sees a single column.
I explicitly stated that the columns are separated with tabs:
\addplot table [x=t, y=E, col sep=tab] {mfe-addplot.dat};
and it works. I tried to change the columns separator to a space, instead of a tab and it also works.
I don't know what pgfplotstable uses to split columns, but the conclusion is that with MkIV 'col sep=space' means space or tab, whereas with LMTX it means strictly a space character.
Thank you very much for your help.
--
Jean-Philippe Rey
jean-philippe.rey@centralesupelec.fr <mailto:jean-philippe.rey@centralesupelec.fr>
91192 Gif-sur-Yvette Cedex - France
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next prev parent reply other threads:[~2020-12-12 14:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-12 9:36 Jean-Philippe Rey
2020-12-12 10:58 ` Hans Hagen
[not found] ` <EB02BBB4-B1B6-45B9-BAA1-0729B3651B32@centralesupelec.fr>
2020-12-12 12:20 ` Hans Hagen
2020-12-12 12:28 ` Wolfgang Schuster
2020-12-12 14:35 ` Jean-Philippe Rey [this message]
2020-12-12 16:01 ` Hans Hagen
2020-12-12 16:03 ` Hans Hagen
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