July 2020 - ntg-context - NTG Mailing Lists

--silent and so on
by thierry horsin 23 Jul '20

23 Jul '20

Hi everybody I am a current context user since now many years and in particular I use it on linux with automatic compilation with a bash script detecting any modifications of the .tex file. In order for this to work I used with previous versions the "--nonstopmode --batchmode --silent --noconsole" compilation options. With these options with a new error in the .tex files with old versions of mkiv the previous pdf produced was not changed. Now with lmtx, appears a single page pdf file with ERROR written on it. Are there compulations options with lmtx in order to have something similar as before ? Any ideas ? Thanks

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Fill an area defined by a subpath (Metafun)
by Fabrice Couvreur 23 Jul '20

23 Jul '20

Hello, I have a little problem with coloring an area (path b). Thanks for your help. Fabrice \starttext \startMPcode path circle, p, q, b; circle = fullcircle xscaled 6cm yscaled 3.5cm; p = (point 2 of circle .. (-0.15cm,1.5cm) ..(0,0)..(0.15cm,-1.5cm).. point 6 of circle); q = (subpath(0,2) of circle -- p -- subpath(6,8) of circle --cycle); b = (p -- subpath(2,6) of circle -- cycle); definecolor [ name = "mp:red", r = 1 ]; definecolor [ name = "mp:blue", r = 0.54, g = 0.17, b = 0.89 ]; fill q withcolor "mp:red" withtransparency(1,0.5) ; fill b withcolor "mp:blue" withtransparency(1,0.5) ; draw circle; draw p; label("$\overline{\text{A}}$",( 1.5cm,0)) withcolor "mp:red"; label("$\text{A}$",(-1.5cm,0)) withcolor "mp:blue"; label.top("E",(0,1.85cm)); \stopMPcode \stoptext

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Using variables and macros for styling of section title and line in table of contents
by James Withers 22 Jul '20

22 Jul '20

Dear list I have a document with section headings which include a title, date and reference spread over two lines with different font style and justification, plus a slightly different text for the table of contents. So that I can alter the styling of the section headings without having to recode each \startsection command, I have used variables and a macro command for the style. This works for section 'title' and 'marking', but not for the 'list' attribute. The minimal working example below shows what I'm trying to do. Best wishes and many thanks in advance. James \define\mytitle{\getvariable{myvar}{title}\crlf{\tfx\getvariable{myvar}{date}\hfill\getvariable{myvar}{ref}}} \define\mylist{\getvariable{myvar}{list}---{\bf \getvariable{myvar}{date}}} \starttext \completecontent \setvariables[myvar][ title={What I would like}, date={2020}, ref={Reference No 1}, list={Variation on title}, ] \startsection[title=\mytitle,list={Variation on title---{\bf 2020}}] Contents line to look like this: \mylist \stopsection \setvariables[myvar][ title={What I get}, date={2021}, ref={Reference No 2}, list={Something for the contents}, ] \startsection[title=\mytitle,list=\mylist] Contents line to look like this: \mylist \stopsection \stoptext <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Bug with lmtx and color in table
by Fabrice Couvreur 22 Jul '20

22 Jul '20

Hello, With the latest version of lmtx, the background color of cells does not work. Thank you. Fabrice \starttext \startxtable [align={middle,lohi}, offset=0.8ex,background=color, backgroundcolor=red,frame=off] \startxrow \startxcell \m{\displaystyle\binom{n-1}{k-1}} \stopxcell \startxcell[width=fit] \m{+} \stopxcell \startxcell \m{\displaystyle\binom{n-1}{k}} \stopxcell \stopxrow \startxrow \startxcell \stopxcell \startxcell[width=fit] \m{=} \stopxcell \startxcell \m{\displaystyle\binom{n}{k}} \stopxcell \stopxrow \stopxtable \stoptext

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No inverse Search when using \usepath
by Gerhard Schramm 22 Jul '20

22 Jul '20

Hello List, Greetings to all members! This is my first post here... Relatively new in Context, I've loved it since the first minute! I write technical manuals with Context. Some chapters of the manuals are depending on the type of the machine which are described in the manual. I try to use \usepath to load the right texfile from different folders. My variable for searching the correct folder is \machinename. \machinename is set before compiling The folders are: /MakeText/Ang/machineA/techdaten/Ang_techdaten.tex /MakeText/Ang/machineB/techdaten/Ang_techdaten.tex ... /MakeText/Ang/machineX/techdaten/Ang_techdaten.tex Tex example: \usepath[/MakeText/Ang/\machinename/] .... \input /techdaten/Ang_techdaten.tex \input /otherfolder/otherfile.tex \input... I can compile and I get a nice PDF, but the inverse search is not possible. (I use Sumatra and Notepad++) NPP only looks at the path after \input... /techdaten/Ang_techdaten.tex Do any of you know a workaround for this? Is \usepath the suited command? Thank you in advance! Gerhard

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Bug in latest LMTX
by Otared Kavian 22 Jul '20

22 Jul '20

Hi Hans, It seems that \cap is not anymore defined in the latest LMTX: the following gives an error \starttext $A \cap B$ \stoptext with current version: 2020.07.21 18:39. Also, I would like to place a request about the reporting of errors: can we get back the nice reporting of errors we had a few months ago? Indeed while a few months ago the reporting of errors was extremeley clear and helpful, now one gets a cryptic message like this in the html file produced: Error ! Missing } inserted File chapitre-1.tex Line 834 Of course there is no missing } error in that file and that line, and one has to spend a lot of time to find what the error would be. In this case I could guess that the error comes from the fact that \cap is not defined, but it wasn't easy (the file used to typeset correctly with version 2020.07.13, and it typesets correctly with mkiv). In eralier versions, ConTeXt would tell the user undefined control sequence \cap and one could fix things very quickly. Best regards, and please pardon my early morning request… Otared

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issue with current latest (2020.07.20)
by Pablo Rodriguez 21 Jul '20

21 Jul '20

Dear list, with current latest (LuaTeX 2.06 20200717 + ConTeXt MkIV 2020.07.20 10:48), I cannot open luametatex.pdf (its SHA256 reads cff8b660b65f4f8c121c170bcd59545c5467a7db02614da137e622ef1c5f3964). Acrobat for Linux complains about malformed document and Evince doesn’t display anything. Latest mupdf-gl complains about broken xref (mupdf complains too): error: cannot recognize xref format warning: trying to repair broken xref warning: repairing PDF document I experience issues in Windows with current latest: \starttext \input zapf \stoptext The output PDF document opens in SumatraPDF fine. But in Acrobat DC, no character is displayed. Could anyone confirm the issues with current latest? Many thanks for your help, Pablo -- http://www.ousia.tk

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Re: [NTG-context] Code lua in a table
by Jeong Dal 21 Jul '20

21 Jul '20

Dear Fabrice, You may split Binom(n,k) function into two functions as following: ***** \startluacode P={} combi = P function P.fact (n) if n <= 0 then return 1 else return n * P.fact(n-1) end end function P.ncr(n,r) return P.fact(n)/(P.fact(r)*P.fact(n-r)) end combi = { fact = fact, ncr = ncr, } \stopluacode ****** Your table is actually Pascal’d triangle. Using the above function, I was able to draw Pascal’s triangles. Hans helped me to complete it. I couldn’t wikify it at that time because I don’t know how to. I’ll do it soon. Here is the whole code for Pascal’s triangle in two different ways using Lua, Metafun and ConTeXt. You may enhance the code. \startbuffer[pt1] numeric n,r,s,u,dx,dy,tt; u := 1.8cm; path p, q; pair A,B,start,now; A := dir(210)*u; B := dir(-30)*u; dy := sind(30)*u; dx := 2*cosd(30)*u; for n=0 upto 4: start := n*dir(210)*u; for r=0 upto n: s := n-r; tt := lua("mp.print(P.ncr(" & decimal n & "," & decimal r & " ))"); now := start+r*right*dx; dotlabel.top(textext("$\displaystyle {" & decimal n & "\choose" & decimal r & "} = "& decimal tt & "$"),now); draw (now+A) -- now -- (now+B); endfor; endfor; \stopbuffer \startbuffer[pt2] numeric n,r,s,u,dx,dy,tt; u := 1cm; path p, q; pair A,B,start,now; A := dir(210)*u; B := dir(-30)*u; dy := sind(30)*u; dx := 2*cosd(30)*u; for n=0 upto 8: start := n*dir(210)*u; for r=0 upto n: s := n-r; tt := lua("mp.print(P.ncr(" & decimal n & "," & decimal r & " ))"); now := start+r*right*dx; label(textext("$" & decimal tt & "$"),now); endfor; endfor; \stopbuffer \startluacode P={} combi = P function P.fact (n) if n <= 0 then return 1 else return n * P.fact(n-1) end end function P.ncr(n,r) return P.fact(n)/(P.fact(r)*P.fact(n-r)) end combi = { fact = fact, ncr = ncr, } \stopluacode \starttext \processMPbuffer[pt1] \blank[big] \processMPbuffer[pt2] \stoptext I hope that it helps. Best regards, Dalyoung

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Pre-registration for 14th ConTeXt Meeting, September 6–12, 2020
by Jano Kula 20 Jul '20

20 Jul '20

Dear ConTeXt users! The 14th ConTeXt Meeting <https://meeting.contextgarden.net/2020/> in the Czech Republic is in preparation as originally planned. As nobody is able to predict the situation in September, we have started pre-registration only and will discuss conditions at the end of July via the mailing list of pre-registered participants. We will take into account up-to-date travel restrictions and health risks and make the final decision on July 31, 2020, based also on the number of pre-registrations. Till then no payment is wanted. All pre-registered participants qualify for early bird discount to be paid during the first week of August. Pre-registration doesn't bind you to pay or attend the meeting. The ConTeXt Group board has discussed other options (on-line meeting, postponing the meeting), but these are unlikely to happen, in case the meeting is cancelled. *14th ConTeXt Meeting* *September 6–12, 2020, Sibřina, Czech Republic* For the second time we will held the meeting at the friendly farm U Škodů, at the eastern border of Prague. See the gallery from 2018 <http://kostverlorenvaart.nl/context2018/> by Frans Goddijn. Topics will cover usage and development of LuaMetaTeX, ConTeXt, and everything related. Each meeting is source of inspiration for everybody, from beginner to expert. Friendly company is always looking for meeting new participants, users of LuaTeX, LuaMetaTeX, ConTeXt, Metapost, etc. There is a special discount for those, who attend the meeting for the first time and for students. Also ConTeXt Group members are qualified for the discount, so consider joining the group. For more details and pre-registration visit the 14th ConTeXt Meeting <https://meeting.contextgarden.net/2020/> page. Hope to see you in September, Jano on behalf of the ConTeXt Group <https://group.contextgarden.net>

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rpi
by Hans Hagen 20 Jul '20

20 Jul '20

Hi, For those interested in tiny machines and tex, processing the luametate xmanual gives this: % 20200720 : 258 pages % % mingw : 10.6 (sometimes less) % rpi 32 : 32.3 % rpi 64 : 26.0 (overclocked) % amd 10 fitlet : 28.2 (the 10.6 is on an 8+ year old intel laptop cpu so i guess that on a modern machine or desktop we're talking half of that) 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 -----------------------------------------------------------------

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