June 2020 - ntg-context - NTG Mailing Lists

latest silly question - insert unicode character?
by Mike Cooper 25 Jun '20

25 Jun '20

Hi. Me again. How does one insert/use a special character? At this particular time, I want Double Prime: Unicode 02BA. How?? THANKS! Mike Cooper Technical Trainer Murchison Drilling Schools, Inc. 2501 Juan Tabo NE Albuquerque, NM 87112 Tel: (505) 293-6271 Fax: (505) 298-5294 Email: mike(a)murchisondrillingschools.com<mailto:mike@murchisondrillingschools.com> Website: www.murchisondrillingschools.com<http://www.murchisondrillingschools.com/> [cid:image007.jpg@01D03ADC.BD6E6850]<https://www.facebook.com/pages/Murchison-Drilling-Schools/158018484232622> [cid:image008.jpg@01D03ADC.BD6E6850] <http://www.linkedin.com/company/murchison-drilling-schools-inc-> [cid:image009.jpg@01D03ADC.BD6E6850] <https://twitter.com/trainingmds> Murchison Drilling Schools is now part of [cid:image001.png@01D63515.857FD120]

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Checking for singlesided/doublesided at run-time
by Lukas/ConTeXt 24 Jun '20

24 Jun '20

Hello, is there a way to detect whether the document is intended as single- or double- sided, IOW, whether \setuppagenumbering[alternative=singlesided] or \setuppagenumbering[alternative=doublesided] has been specified? If so, is it possible by Lua, too? Regards, Lukas

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explain please
by Hans van der Meer 24 Jun '20

24 Jun '20

How can the crash in the minimal example here be explained? And is there a solution to avoid this and make the crash going away "without having to jump through special hoops"? dr. Hans van der Meer

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Automatic userdata storage between runs
by Lukas/ConTeXt 24 Jun '20

24 Jun '20

Hello, first - thanks for the perfectly synoptical https://wiki.contextgarden.net/Programming_in_LuaTeX#Namespaces ! My question (and the answer sould appear on wiki, too): Is any of the namespaces (userdata, thirddata, moduledata, documentdata, parametersets) automatically serialized between Ctx first(-second(-third)) runs? I'm asking because user may call some (longer) code and put the result into a namespace (be it e.g. "userdata"). And if that namespace was automatically serialized for next run(s), that code could be called conditionally - typically just in first run (= mode "*first" enabled) - as in next runs results of the additional code would be available in a namespace (instead of repetitive call of that (longer) code). Of course, user can perform such evaluation, storage and conditional extra-code-call individually, but maybe there is some support for similar situations in Ctx. Best regards, Lukas

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CMYK workflow. How to set and should I worry about
by Keith McKay 24 Jun '20

24 Jun '20

Colleagues I'm getting ready to send a book to the printers and in their blurb they state "/Ensure that you are using a CMYK workflow and export to PDF/X-1a:2001" . /I can set the pdf format using \setupbackend but I'm unsure as to what to do about CMYK workflow. The book has no colour pages so I'm not sure if I really need to worry about CMYK workflow. Could someone advise? Thanks and Best Wishes Keith McKay //

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METAPOST's uniformdeviate is not truly random (seed)
by Gerben Wierda 23 Jun '20

23 Jun '20

I’m trying to get a real random number in METAPOST MWE: \startMPpage[instance=doublefun] show uniformdeviate 60; \stopMPpage Every time I run this, it shows the same result. I tried playing around with the randomseed, but for instance when I do two runs shortly after each other they still are very predictable. E.g. this in METAPOST: whatever = lua( "math.randomseed( tonumber(tostring(os.time()):reverse():sub(1,6)) )"); randomseed := lua.math.random(); minutespast := uniformdeviate 60; Called shortly after each other (two LMTX runs) gets me the same result. What is a good way to get better random numbers in METAPOST (LMTX)? Thanks, G

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loading xml error
by Hans van der Meer 23 Jun '20

23 Jun '20

Please can someone explain the following error and why the one specific XML input fails? It turns out that a single node <node/> is not accepted by the core whereas others are ok. This is the error message in the log, first line from my debug statement: HVDM-VOC > load vocabulary from buffer "german" xml > core > load error in [buffer: german]: invalid xml file - parsed text Minimal code to explain what is done: % Loading from buffer. \def\loadvocabularyfrombuffer#1{% \writestatus{HVDM-VOC}{load vocabulary from buffer "#1"}% \XMLProcessBuffer{#1}% % simply does an \xmlprocessbuffer{}{}{} } The following buffer gives the error: \startbuffer[german] <vocabulary use="de"/> \stopbuffer \loadvocabularyfrombuffer{german} But the others below are ok and load as expected. \startbuffer[german] <vocabulary use="de"></vocabulary> \stopbuffer and \startbuffer[german] <root><vocabulary use="de"/></root> \stopbuffer dr. Hans van der Meer

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Undefined control sequence: \pdfpxdimen
by Aditya Mahajan 23 Jun '20

23 Jun '20

The drops module uses the primitive \pdfpxdimen in a couple of places, but that is no longer defined in the current beta. What is the equivalent command now? Examples of usage: \pdfpxdimen1in\relax\divide\pdfpxdimen\numexpr\dropsparameter\c! resolution\relax % set actual pixel dimension Aditya

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How to define an array of pens
by Otared Kavian 22 Jun '20

22 Jun '20

Hi Hans, After learning from you how to define an array of colors and paths, I would like to know how is it possible to define a variable pen size. In the following working example below, I would like to replace MyPens[j] := pencircle scaled 2pt ; by something like MyPens[j] := pencircle scaled (2+j) pt ; but this does not work (neither do (2+j)*pt). Is it possible to specify the pen size according to the value of j, without using a structure like if j == -1 : MyPens[j] := pencircle scaled 1pt ; elseif j == 0 : MyPens[j] := pencircle scaled 2pt ; else : MyPens[j] := pencircle scaled 3pt ; fi (In my real example I have more than three values for j). %% begin example-array.tex \startMPpage string MyColors[] ; path MyPaths [] ; pen MyPens[] ; for j = -1 step 1 until 1 : MyPens[j] := pencircle scaled 2pt ; % I would like to say here (2+j) pt endfor MyPaths[-1] := (-1.5cm,1.5cm) -- (1.5cm,1.5cm) ; MyColors[-1] := "magenta" ; MyPaths[0] := (-2cm,2cm) -- (2cm,-2cm) ; MyColors[0] := "darkyellow" ; MyPaths[1] := fullcircle scaled 3cm ; MyColors[1] := "darkred" ; for j = -1 step 1 until 1 : draw MyPaths[j] withpen MyPens[j] withcolor MyColors[j] ; endfor \stopMPpage %% end example-array.tex Best regards: Otared

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How to define an array of colors in Metafun
by Otared Kavian 20 Jun '20

20 Jun '20

Hi all, I have a family of graphs to draw in Metapost and I would like to attribute a different color to each of them according to the value of a certain variable. Assuming that the path mygraph(j) depends on the variable j, which is computed within a lua code and passed to Metapost, I wonder if it is possible to define an array of colors named mycolor, so that I could say draw mygraph(j) withcolor mycolor(j) ; Here the variable j takes integer values (say between 1 and 10), and one would have defined mycolor(1) through mycolor(10). Thanks in advance for any help: Otared K.

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