> Le 12 déc. 2020 à 13:20, Hans Hagen <j.ha...@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.ha...@xs4all.nl
>>> <mailto:j.ha...@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....@centralesupelec.fr
<mailto:jean-philippe....@centralesupelec.fr>
91192 Gif-sur-Yvette Cedex - France
Empreinte PGP : 807A 5B2C 69E4 D4B5 783A 428A 1B5E E83E 261B BF51
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
