$\xrightarrow{}{}$

This throws errors. Any idea why?

$\xrightoverleftarrow{}{33°C}$

This does work. Sadly it is not the arrow I want to have. Mathias

Am 14.07.2017 um 21:25 schrieb Alan Braslau :

On Fri, 14 Jul 2017 11:33:14 +0200 Mathias Schickel wrote:

...

Dear list,

I want to typeset an extensible arrow as described in this document: http://dl.contextgarden.net/myway/matharrows.pdf http://dl.contextgarden.net/myway/matharrows.pdf Sadly I get errors if I use \xrightarrow (even this simple command does not work).

Do extensible arrows still exists in ConTeXT and how can I use them?

Best Mathias

$\xrightarrow{}{}$ $\xrightoverleftarrow{}{33°C}$ etc.

Alan

Am 22.07.2017 um 22:34 schrieb Alan Braslau :

On Fri, 21 Jul 2017 12:31:33 +0200 Mathias Schickel wrote:

...

...

$\xrightarrow{}{}$

This throws errors. Any idea why?

...

$\xrightoverleftarrow{}{33°C}$

This does work. Sadly it is not the arrow I want to have.

MWE:

\starttext $A \xrightarrow{}{} B$ \stoptext

No problem here.

It seems to be a problem with the font I use. Hans, do you have any idea why that does not work if I am using Minion Math? I am getting the following error: attempt to get length of local 'charlist' (a nil value) stack traceback: ...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:514: in function 'horizontalcode' ...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:541: in function <...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:540> (...tail calls...) Mathias

Alan

Am 26.07.2017 um 00:47 schrieb Hans Hagen :

On 7/26/2017 12:01 AM, Mathias Schickel wrote:

...

...

Am 22.07.2017 um 22:34 schrieb Alan Braslau mailto:braslau.list@comcast.net>:

On Fri, 21 Jul 2017 12:31:33 +0200 Mathias Schickel mailto:msch@fa.uni-tuebingen.de> wrote:

...

...

$\xrightarrow{}{}$

This throws errors. Any idea why?

...

$\xrightoverleftarrow{}{33°C}$

This does work. Sadly it is not the arrow I want to have.

MWE:

\starttext $A \xrightarrow{}{} B$ \stoptext

No problem here. It seems to be a problem with the font I use. Hans, do you have any idea why that does not work if I am using Minion Math? I am getting the following error: attempt to get length of local 'charlist' (a nil value) stack traceback: ...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:514: in function 'horizontalcode' ...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:541: in function <...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:540> (...tail calls...) you can patch this in that file and remake the format

elseif kind == e_right then local charlist = data[3].horiz_variants if charlist then local right = charlist[#charlist] roffset = abs((right["start"] or 0) - (right["end"] or 0)) end

Hi Hans, thank you for your quick answer! I am not sure How I can remake that format. Can you tell me the command for that? And can you maybe patch that in the distribution, too? (Else I fear that I have to remake that format every time I will update the distribution from contextgarden.) Best Mathias

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Am 26.07.2017 um 08:07 schrieb Pablo Rodriguez :

On 07/26/2017 07:20 AM, Mathias Schickel wrote:

...

...

Am 26.07.2017 um 00:47 schrieb Hans Hagen: [...]>> you can patch this in that file and remake the format

elseif kind == e_right then local charlist = data[3].horiz_variants if charlist then local right = charlist[#charlist] roffset = abs((right["start"] or 0) - (right["end"] or 0)) end

Hi Hans,

thank you for your quick answer! I am not sure How I can remake that format. Can you tell me the command for that?

Hi Matthias,

as far as I can remember, the command is (I have used it in the past, but my memory is weak):

context --make --all

Hi Pablo, thank you for advice! Unfortunately I still get the error ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:514: attempt to get length of local 'charlist' (a nil value) stack traceback: ...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:514: in function 'horizontalcode' ...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:541: in function <...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:540> (...tail calls…) I see two possible reasons for that: Either the command „context --make --all“ is not the right one (besides: How can I check if ConTeXt has remade the format?), or the code is not correctly changed. Maybe you can answer that, Hans. From line 506 on the code of math-act.lua now is if kind == e_left then local charlist = data[3].horiz_variants if charlist then -- this is the line of the first error as the error code suggests local left = charlist[1] loffset = abs((left["start"] or 0) - (left["end"] or 0)) end elseif kind == e_right then local charlist = data[3].horiz_variants if charlist then local right = charlist[#charlist] roffset = abs((right["start"] or 0) - (right["end"] or 0)) end elseif kind == e_horizontal then local charlist = data[3].horiz_variants if charlist then local left = charlist[1] local right = charlist[#charlist] loffset = abs((left ["start"] or 0) - (left ["end"] or 0)) roffset = abs((right["start"] or 0) - (right["end"] or 0)) end end return kind, loffset, roffset Is that correct now? In every case the error code mentioned another line of the same file: math-act.lua:541: in function <...ext/tex/texmf-context/tex/context/base/mkiv/math-act.lua:540> (...tail calls…)

...

And can you maybe patch that in the distribution, too? (Else I fear that I have to remake that format every time I will update the distribution from contextgarden.) As far as I can tell, Hans will fix ConTeXt (he has done in the past). But he has provided the patch, so that you may work until the next beta update.

Okay, that is very good!

Cheers,

Pablo

Best Mathias

-- http://www.ousia.tk ___________________________________________________________________________________ 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 ___________________________________________________________________________________

Am 26.07.2017 um 17:36 schrieb Pablo Rodriguez :

On 07/26/2017 01:31 PM, Mathias Schickel wrote:

...

[...] Hi Pablo,

thank you for advice! Unfortunately I still get the error [...] I see two possible reasons for that:

Either the command „context --make --all“ is not the right one (besides: How can I check if ConTeXt has remade the format?), or the code is not correctly changed. Maybe you can answer that, Hans.

Hi Matthias,

The log displays the date of the format in its third line:

system > ConTeXt ver: 2017.07.17 00:20 MKIV beta fmt: 2017.7.26 int: english/english

A minimal sample:

\definefontfamily[mainfont][rm][MinionPro] \definefontfamily[mainfont][mm][Minion Math] \setupbodyfont[mainfont] \starttext $A \xrightarrow{}{} B$ \stoptext

This should work fine in your computer with \setupbodyfont[pagella] or no \setupbodyfont. The previous sample works fine in my computer, because I don’t have Minion Math installed.

The problem here is that we don’t have access to your fonts. Guessing may be hard, so could you provide another font (freely available to anyone) that shows the issue?

The problem is that I have not yet found another font that showed the problem. Using LuaLaTeX and fontspec \xrightarrow does work as intended. Besides I know that Hans has a version of Minion Math. Maybe he can try himself. Else we could ask Johannes Küster (the designer of Minion Math) if he could provide you files for testing. Possibly the true problem is that I have not been able to properly remake the format. I have executed context --make --all on the terminal but I am getting MKIV beta fmt: 2017.7.25. Does that mean that the change in the file is not realised by ConTeXT? Or does that only tell me when I have downloaded the beta itself?

...

From line 506 on the code of math-act.lua now is [...] Is that correct now?

I don’t know. But you may check it yourself and then report back.

I am not a lua programmer and I have no idea what that code does. So maybe Hans can tell me if I changed the code as he intended.

Pablo

Mathias

-- http://www.ousia.tk ___________________________________________________________________________________ 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 ___________________________________________________________________________________

Am 27.07.2017 um 18:33 schrieb Hans Hagen :

On 7/27/2017 6:02 PM, Mathias Schickel wrote:

...

I am not a lua programmer and I have no idea what that code does. So maybe Hans can tell me if I changed the code as he intended. i uploaded a beta

I can confirm that everything is working as intended! Thank you very much, Hans!

----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------