On 7/13/2020 8:53 PM, Adam Reviczky wrote:
> Hi,
>
> Using the minimal example from the contextgarden for gnuplot
> (https://wiki.contextgarden.net/Gnuplot) I am getting the following
> error message:
>
> This is LuaTeX, Version 1.13.0 (TeX Live 2021/dev/Debian)
>   system commands enabled.
> open source     > level 1, order 1, name
> '/usr/share/texmf/tex/context/base/mkiv/cont-yes.mkiv'
> system          >
> system          > ConTeXt  ver: 2020.07.13 16:23 MKIV  fmt: 2020.7.13
>   int: english/english
> system          >
> system          > 'cont-new.mkiv' loaded
> open source     > level 2, order 2, name
> '/usr/share/texmf/tex/context/base/mkiv/cont-new.mkiv'
> system          > beware: some patches loaded from cont-new.mkiv
> close source    > level 2, order 2, name
> '/usr/share/texmf/tex/context/base/mkiv/cont-new.mkiv'
> system          > files > jobname 'mwe', input './mwe', result 'mwe'
> fonts           > latin modern fonts are not preloaded
> languages       > language 'en' is active
> open source     > level 2, order 3, name '/tmp/4/mwe.tex'
> modules         > 'gnuplot' is loaded
> open source     > level 3, order 4, name
> '/usr/share/texmf/tex/context/third/gnuplot/t-gnuplot.mkiv'
> loading         > Gnuplot module
> open source     > level 4, order 5, name
> '/usr/share/texmf/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
> close source    > level 4, order 5, name
> '/usr/share/texmf/tex/context/fonts/mkiv/type-imp-texgyre.mkiv'
> close source    > level 3, order 5, name
> '/usr/share/texmf/tex/context/third/gnuplot/t-gnuplot.mkiv'
>
> lua error       > lua error on line 4 in file /tmp/4/mwe.tex:
>
> /usr/share/texmf/tex/context/base/mkiv/buff-ini.lua:439: attempt to call
> a nil value (upvalue 'gettoken')
> stack traceback:
> /usr/share/texmf/tex/context/base/mkiv/buff-ini.lua:439: in upvalue 'pickup'
> /usr/share/texmf/tex/context/base/mkiv/buff-ini.lua:635: in function
> </usr/share/texmf/tex/context/base/mkiv/buff-ini.lua:626>
> (...tail calls...)
>
>   1     \usemodule[gnuplot]
>   2
>   3     % write a script for gnuplot
>   4 >>  \startGNUPLOTscript[sin]
>   5        plot sin(x)
>   6     \stopGNUPLOTscript
>   7
>   8     % include the resulting graphic into the document
>   9     \useGNUPLOTgraphic[sin]
> 10
>
> mtx-context     | fatal error: return code: 256
>
> Does the gnuplot module need adjustments?
No, i messed up something ... will be fixed tomorrow

Do you have lmtx installed? It has nicer gnuplot support:

m-gnuplot-demo.gp :

------------------------------------------------
set format xy "$%g$"

set title  'This is a plot of $y=\\sin(x)$'
set xlabel 'This is the $x$ axis'
set ylabel 'This is the $y$ axis'

plot [0:6.28] [0:1] sin(x)
------------------------------------------------

Can be included with:

\starttext

     \externalfigure[m-gnuplot-demo.gp][conversion=svg,width=4cm]

     \externalfigure[m-gnuplot-demo.gp][conversion=svg,width=8cm]

\stoptext


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