TeX, LaTeX and Friends - 2020-09-01

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Phelype Oleinik

00:34

@DavidCarlisle @UlrikeFischer @JosephWright tex.stackexchange.com/a/560921/134574

It seems like the trivial definition of \NoCaseChange is problematic if the case-changing code looks for it using \ifx. It should probably be redefined to something different (even if redundant, like \def\NoCaseChange#1{\@firstofone{#1}}), or the case changing code should look for exactly \NoCaseChange

4 hours later…

cis

04:31

17 hours ago, by Paulo Cereda

user image

I saw a cat like that, then I crawled its belly. Then it attacked me with all 4 paws because it tickled her. :(

2 hours later…

Rmano

06:06

@cis goodreads.com/quotes/… :-P

Anonymous

06:36

Thank you @cis I will look at your code tonight.

I guess I can make the two sets of rulers work, by doing a lot of copy and paste, but it might be neat if we could find a good loop for that. Such that, if somebody else would like to have 3 images, each inside a set of ruler, next to eachother, they can also achieve that.

Joseph Wright

06:55

@PhelypeOleinik Isn't the issue that acro is passing some 'text' to the case changer before it's fully expanded it? So you'd see incorrect output anyway with the 'fix' of a more complex definition of \NoCaseChange? That said, I could tighten up the test so it's not \ifx but rather checks the name of the command (so it has to be \NoChangeCase or whatever)

Phelype Oleinik

07:20

@JosephWright It seems to rely on \text_titlecase_first:n to do the expansion (which makes for a rather large \tracingall :-). However this does the same, once \NoChangeCase is added:

\documentclass{article}
\begin{document}
\ExplSyntaxOn
\tl_put_right:Nn \l_text_expand_exclude_tl { \NoCaseChange }
\tl_put_right:Nn \l_text_case_exclude_arg_tl { \NoCaseChange }
\cs_set_eq:NN \NoCaseChange \use:n

\text_uppercase:n
  {
    \tl_map_tokens:nn
      { {abc} {def} }
      { tokens }
  }
\ExplSyntaxOff
\end{document}

Phelype Oleinik

07:53

phelype@phelype ~> latex-dev '\ShowCommand\textbf'
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=latex-dev)
 restricted \write18 enabled.
entering extended mode
LaTeX2e <2020-10-01> pre-release-8 (develop 2020-9-1 branch)
L3 programming layer <2020-08-07> xparse <2020-03-03>
> \textbf=robust macro:
->\protect \textbf  .

> \textbf =\long macro:
#1->\ifmmode \nfss@text {\bfseries #1}\else \hmode@bgroup \text@command {#1}\bf
series \check@icl #1\check@icr \expandafter \egroup \fi .

@UlrikeFischer @DavidCarlisle @JosephWright ^^^

Ulrike Fischer

@PhelypeOleinik I know that, I already used it ;-). It is really a nice extension!

Phelype Oleinik

@UlrikeFischer /blush :)

Joseph Wright

@PhelypeOleinik fix in hand, just setting up tests

Phelype Oleinik

@JosephWright Oh, nice!

@JosephWright Oh, I should add \ShowCommand support to etoolbox as well...

1 hour later…

Joseph Wright

09:11

@PhelypeOleinik Would be good

@PhelypeOleinik Do you plan to extend for xparse-type commands so one sees the 'internal' definition?

@PhelypeOleinik, @UlrikeFischer, @DavidCarlisle I'll do a release today, bringing in the text case fix plus the colour updates and the backend file name changes

@DavidCarlisle Will you do graphics-def? The dev release is out so it should be 'safe'

@UlrikeFischer We should work out a request for dvipdfmx: I was thinking pdf:sc, pdf:fc (stroke and fill), pdf:cs X ... (color stack X, to take a 'raw' PDF string) - would that work?

Ulrike Fischer

@MarcelKrüger @JosephWright I'm just trying to prepare the luaotfload update (but travis wasn't happy yesterday, I hope they got the new dev now and unicode-math behaves again). Some of the tests only work with dev, and imho we will get this more often in the future and should keep track here, so I changed the build.lua, to run tests with both and moved the tests which works only for one in a dedicated folder. I hope this will work out as expected ;-)

Rmano

@samcarter_is_at_topanswers.xyz could you please point to a tutorial on how to write userscripts? For example, I struggled quite a bit (as a greasemonkey n00b) to make tex.meta.stackexchange.com/a/8653/38080 work...

Joseph Wright

09:27

@UlrikeFischer :)

David Carlisle

@JosephWright yes I'll do it today, as you may have seen I did some cosmetic updates yesterday to get it all in to shape

Paulo Cereda

@PhelypeOleinik a machine name with your name... hm

samcarter_is_at_topanswers.xyz

@Rmano For the line height change, there is already a ready-to-use user script at github.com/CertainPerformance/Stack-Exchange-Userscripts/tree/…

(more extensions can be found at meta.stackexchange.com/questions/353525/…)

David Carlisle

@JosephWright stats for learnlatex (or at least latexcgi) seemed quite healthy over the weekend, regularly over 200 documents a day it seems.

Joseph Wright

@DavidCarlisle Cool: certainly rising

Ulrike Fischer

09:44

@DavidCarlisle it can't run dvilualatex and show the log ;-(. (I wanted to check one question on the main site).

Joseph Wright

@DavidCarlisle Looks good

David Carlisle

@UlrikeFischer blurg I could add it but it's a bit "specialist" :-) If there was a working dvips then....

Rmano

@samcarter_is_at_topanswers.xyz Thanks!

Ulrike Fischer

@DavidCarlisle no not really needed ;-) (but it is nice side effect to have a "pure" system at hand for tests).

David Carlisle

@UlrikeFischer but it is up to date with texlive as of this morning

Ulrike Fischer

09:53

@DavidCarlisle that is nice too ;-). I'm using overleaf to check against "outdated" code and learnlatex for the newest.

Phelype Oleinik

@JosephWright Yes, I will, but I won't have time to do it for today's release

@JosephWright Unless you postpone it a day or two, but that's not pressing, so I think it can wait for the next one

Joseph Wright

@PhelypeOleinik Sure: no urgency

@PhelypeOleinik Probably can go in when we move most of xparse to l3kernel

Phelype Oleinik

@JosephWright Ah, yes, there's that. I can work on it over the weekend

@JosephWright I already have some code for xparse \NewCommandCopy, but it's not quite done yet... I think I'll goo the lazy way and just read the command definition and do a \DeclareDocumentCommand...

@PauloCereda Maybe I am the machine!

/plot twist intensifies

Paulo Cereda

10:11

@PhelypeOleinik ooh BORG

Phelype Oleinik

@PauloCereda You will be... Exterminated? :-)

Paulo Cereda

@PhelypeOleinik ooh a dalek

Phelype Oleinik

@PauloCereda Oh, no, wrong again :)

David Carlisle

@JosephWright do you think it would be worth having an l3build boolean variable to skip the binary zip stage so you don't get zip error: Nothing to do! (graphics-def-ctan.zip) You could automatically detect that no files are being zipped in l3build but it's a bit inconvenient as you need to file glob for the include and exclude lists and check there is nothing left, so having a user-settable flag to skip this might be nice.

@JosephWright It's a bit disconcerting when the last line of the terminal output from l3build ctan is an error

Ulrike Fischer

@DavidCarlisle why is there no zip?

David Carlisle

10:22

@UlrikeFischer it's not that there is no zip it's that there are no pdf or other binary files, so the zip gets made with the def files then zip is called again in binary mode but passed an empty list of files to add.

Joseph Wright

@DavidCarlisle Do you want to answer Yannis' question, should I, should we do a joint answer, ...?

David Carlisle

@JosephWright I answered as comment feel free to make a fuller answer as an answer:-)

Joseph Wright

@DavidCarlisle OK, I'll start on one

Ulrike Fischer

10:39

@DavidCarlisle ah yes. You could add a pdf-documentation saying "look in the code".

David Carlisle

@UlrikeFischer it could say "these were fine in 1993, if Ulrike broke them since then it's not my fault"

Joseph Wright

@DavidCarlisle Sure, nice and easy to do

Ulrike Fischer

10:54

@DavidCarlisle with a nice picture?

Paulo Cereda

@UlrikeFischer ooh two ducks in a chess tower

David Carlisle

@UlrikeFischer no but a nice coloured page background

Paulo Cereda

@DavidCarlisle ooh

linda Oiladali

11:08

hello, i have a too long theorem how to display it into multiple frame ?

I trye \begin{frame}[allowframebreaks,allowdisplaybreaks]

but it doesn't do anything

samcarter_is_at_topanswers.xyz

@lindaOiladali Can you make a minimal working example? Probably overlays are easier then framebreaks (which are evil :) )

Joseph Wright

11:34

@DavidCarlisle Ended up as something of an essay: I'll add some comments back to our sources too!

David Carlisle

@JosephWright yes was just reading it

1 hour later…

nbro

12:48

getting the damned annoyed "undefined control sequence" when using the solution here tex.stackexchange.com/a/11072/63097 in a beamer

ideas??

Here's the code

```

\def\imageA#1{\adjustbox{valign=m}{\includegraphics[width=#1em]{figures/inputs/input1.pdf}}}

\def\imagea{{% mathord
\mathchoice
{\imageA{4}}%
{\imageA{4}}%
{\imageA\defaultscriptratio}%
{\imageA\defaultscriptscriptratio}}}

\def\imageB#1{\adjustbox{valign=m}{\includegraphics[width=#1em]{figures/inputs/input2.pdf}}}

\def\imageb{{% mathord
\mathchoice
{\imageB{4}}%
{\imageB{4}}%
{\imageB\defaultscriptratio}%
{\imageB\defaultscriptscriptratio}}}

\def\labelA#1{\adjustbox{valign=m}{\includegraphics[width=#1em]{figures/inputs/label1.pdf}}}

I used this exact same code in another document and it worked...

David Carlisle

@nbro not in a form anyone can use or test.

@nbro you have not said which command is undefined or provided code that shows the problem.

nbro

It's even annoying to copy and paste the error from the editor I am using

Joseph Wright

@DavidCarlisle I'm having an interesting time reading the dvipdfmx sources (@UlrikeFischer might enjoy it too)

@nbro Pick another editor

nbro

! Undefined control sequence.\imageA #1->\adjustbox{valign=m}{\includegraphics [width=#1em]{figures/inpu... $\imagea

David Carlisle

@nbro then use a better editor but don't waste everyone's time by complaining here and posting unusable code fragments,

3

nbro

12:52

...

David Carlisle

@nbro post the error in multi-line form so we can see which command is undefined,

Joseph Wright

@nbro WE need the formatting: copy-paste from the .log file

Ulrike Fischer

should I say the same too so that we are three?

David Carlisle

@JosephWright I was looking there the other day for the page color white = no page color test:-)

@UlrikeFischer no, you should say, "sorry it's my fault"

nbro

```
! Undefined control sequence.
\imageA #1->\adjustbox
{valign=m}{\includegraphics [width=#1em]{figures/inpu...
l.2 $\imagea
$
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

File: figures/inputs/input1.pdf Graphic file (type pdf)
<use figures/inputs/input1.pdf>
! Undefined control sequence.

David Carlisle

12:54

@nbro well you have not defined adjustbox (by the package of that name)

Ulrike Fischer

@nbro and now guess which command is undefined and so which package is missing.

David Carlisle

@nbro so you are "damned annoyed" by your user error of using package commands without loading the package.

nbro

It's still very annoying

very very annoying

It could simply tell me "You're missing this package"

David Carlisle

@nbro why ???? You expect commands to work without being defined???

@nbro how could it tell you that. You might just have typed \lksadlakalkalkda why should it be assumed that there is a package?

Joseph Wright

@nbro LaTeX can't tell which package(s) define which commands

nbro

12:57

the problem was the package \usepackage{adjustbox} missing

not the command not being defined

David Carlisle

@nbro You know that. LaTeX can not possibly now that.

nbro

if latex was aware of packages, the message could be more direct

rather than "undefined control sequence", which is misleading

David Carlisle

@nbro No.

@nbro if you had read the error messages instead of swearing here you would immediately have seen which command is undefined, and you would have known how to define it. It is an accurate error message that pinpointed your error.

6

nbro

It could. For example, every programming language could be aware of the "official" packages/libraries that are available for it, then search for the package that possibly fixes the issue, this could be done, although I don't think many languages do it

I don't even know what all these files that latex produces are meant for

David Carlisle

@nbro in some theoretical non existing world where the language compiler knows about every program written by every user of the language, I suppose that is possible, yes.

nbro

13:01

In the future, this will be possible, I think

David Carlisle

@nbro no.

nbro

at least approximately

it won't always work, but it will work in many cases

it will be possible thanks to ML learning algorithms that learn from error messages, etc.

David Carlisle

@nbro not even close. The current messag eis accurate and never misleading. If you mistype \documentclass as \documentklass and it suggests that you load a missing package to define it, how would that help?

nbro

anyway, thanks, now I know that I have to look into the .log file to see the full error message

The current message is not explicit enough

I'd like it to say "Maybe you are missing a package?"

that would be more helpful

David Carlisle

@nbro yes it is explicit about the exact location and cause of teh error.

@nbro tex does not even know about packages that is something that latex defines. What you are suggesting really makes no sense at all, sorry.

nbro

13:04

but even the error in the log file is not very descriptive

it says

"The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined."

there is not \adjustbox is undefined

only a general "control sequence", whatever that means

David Carlisle

@nbro oh for goodness sake, that is a fixed help text explaining that you have an undefined command. The actual error message shows you which command is undefined and where you have used it.

2

nbro

Ok, we have different opinions then

you want to say that this error message is clear enough?

ok

David Carlisle

@nbro you posted it above, and everyone reading it new in a second that you had used \adjustbox without defining it, so yes more than clear enough.

Anush

can anyone tell me how to get listings and only to work together? As in :

Paulo Cereda

twitter.com/paulocereda/status/1300782091383320576

Anush

13:07

\documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\setbeamersize{text margin left=10mm,text margin right=5mm}
\setbeamertemplate{frametitle}[default][center]
\usepackage[many]{tcolorbox}
\usepackage{listings}
\usepackage{calc}

\begin{document}

\begin{frame}[fragile]{The tidemark algorithm}
\only<1>{
\begin{lstlisting}[ mathescape, name=tidemark, basewidth = {.3em}]
text
\end{lstlisting}
}
\end{frame}
\end{document}

Ulrike Fischer

@PauloCereda I have no idea what an RESTful API is, but a sloth as logo sounds fitting.

Paulo Cereda

@UlrikeFischer ooh :)

@UlrikeFischer also, some users are lazy to look up documentation, which also sounds fitting. :)

Of course I used longtable as example. :)

Anush

the answer seems to be \begin{onlyenv} .. \end{onlyenv}. Now trying to see which manual that is in

beamer it seems. What is written is incomprehensible to me

but it works

samcarter_is_at_topanswers.xyz

@Anush You must have fragile content inside macros, that's why \only won't work

Anush

what is fragile in my example above?

David Carlisle

13:18

@UlrikeFischer It means having a URL you can bookmark, not a hidden POST request

samcarter_is_at_topanswers.xyz

@Anush The code listing

Anush

@samcarter_is_at_topanswers.xyz it is just that the frame has "fragile" as an argument?

@samcarter_is_at_topanswers.xyz how would you know in advance that it was fragile?

David Carlisle

@PauloCereda ^

samcarter_is_at_topanswers.xyz

@Anush No, the fragile frame options just allows you to have fragile content in the frame

@Anush rule of thumb: source listings are fragile

Anush

ok.. what does fragile mean?

maybe that was a better question

David Carlisle

13:20

@samcarter_is_at_topanswers.xyz although the beamer terminology is unfortunate as it mostly means verb-like rather than fragile in the sense of latex \protect

samcarter_is_at_topanswers.xyz

@DavidCarlisle Who would choose to speak latex, if one can speak beamer?

David Carlisle

@samcarter_is_at_topanswers.xyz people of refinement and good taste?

samcarter_is_at_topanswers.xyz

@DavidCarlisle Are there such people? We already know from your pineapple pizza stories that good taste is not your strength :)

David Carlisle

@samcarter_is_at_topanswers.xyz so you get to answer @Anush's question as to what fragile means.

samcarter_is_at_topanswers.xyz

@DavidCarlisle That's easy: everything that causes an error without the fragile option but works with the option :)

Paulo Cereda

13:24

@DavidCarlisle <3

Anush

solved! :)

samcarter_is_at_topanswers.xyz

@Anush In beamer terms: the major use cases for the fragile option are code listings and some tikz stuff

Anush

ok thanks

samcarter_is_at_topanswers.xyz

@Anush Do you want to write an answer yourself?

Anush

I would rather not as I don't understand the words on page 85 of the beamer manual

nbro

13:31

I have an equation as follows $$ \text{{\Large f }}\left( \imagea \right) = \labela $$, where \imagea and \labela are commands that include an image in the equation. Now, this equation has a certain size. I would like to dynamically remove \imagea or \labela, but maintain the size of the equation as if they were included

how can I do that?

Anush

"If the ⟨overlay specification⟩ is given, the contents of the environment is inserted into the text only on the
specified slides. The difference to \only is, that the text is actually typeset inside a box that is then thrown
away, whereas \only immediately throws away its contents. If the text is not “typesettable,” the onlyenv
may produce an error where \only would not."

which seems to be the only explanation of onlyenv in the manual

nbro

I am using `\only<1>{
EQUATION
}` to create the animations

but I don't know how to keep the dimensions of the equations even if I remove \imagea

samcarter_is_at_topanswers.xyz

@Anush I think for a user, the more important thing to know is the paragraph above this:

> For each of the basic commands \only, \alt, \visible, \uncover, and \invisible there exists “envi- ronment versions” onlyenv, altenv, visibleenv, uncoverenv, and invisibleenv. Except for altenv and onlyenv, these environments do the same as the commands.

Anush

@samcarter_is_at_topanswers.xyz but how would a user know that the obscure error message you see needs an "environment" to fix it?

samcarter_is_at_topanswers.xyz

(there is really not much more one needs to know about the onlyenv)

@Anush That's not beamer specific. You would have the same problem if you would try to place the listing in a \parbox{...} or similar

Anush

13:38

" Except for altenv and onlyenv, these environments do the same as the commands." implies they do something different but it doesn't way what

@samcarter_is_at_topanswers.xyz ok.. I look forward to your answer :)

samcarter_is_at_topanswers.xyz

@Anush You mean look backward?

Anush

aha :)

samcarter_is_at_topanswers.xyz

@nbro Check the documentation for overlayarea and don't use $$...$$

Anush

"the argument of a macor."

is macor a typo for macro?

samcarter_is_at_topanswers.xyz

@Anush thanks! fixed

Anush

13:43

I fixed the other typo :)

samcarter_is_at_topanswers.xyz

@Anush ... and I destroyed by editing at the same time, sorry. I'll fix it

Anush

I would like to show a 3d 20 sided die with the number at the top chosen at random. Can anyone think of a simple way to do that?

something like images-na.ssl-images-amazon.com/images/I/…

but random like these historicalboardgaming.com/thumbnail.asp?file=assets/images/dice/…

samcarter_is_at_topanswers.xyz

@Anush A simple way is to ask a question mentioning tikz in the title and I'm sure some rodent will post some brilliant answer

Anush

@samcarter_is_at_topanswers.xyz :) thanks! on topanswers there is a 50% chance it will be you :)

samcarter_is_at_topanswers.xyz

@Anush No, I'm a duck not a rodent :)

Anush

13:46

ah!

David Carlisle

@nbro \phantom{\imagea}

@samcarter_is_at_topanswers.xyz ducks taste better

samcarter_is_at_topanswers.xyz

@DavidCarlisle That sounds dangerous :)

nbro

actually, I wasn't clear enough. I would like to start from f(x) = y, i.e. a general description of a function, and then include the image that corresponds to x and y

samcarter_is_at_topanswers.xyz

@nbro as already said: overlayarea

nbro

ok, let me check

Rmano

14:42

@samcarter_is_at_topanswers.xyz depending on the situation he can maybe use \uncover, or am I wrong? I use it in align* and it works...

With a bit of care...

samcarter_is_at_topanswers.xyz

@Rmano Sure, but they persistently refuse to show some mwe of what they do, so overlayarea seems to be the safest bet

Anush

15:33

hmm. I have

\only<2>{

\begin{itemize}[<+->]
\setlength\itemsep{0.3cm}
\item Stream: 5, 4, 5, 7, 4, 5, 7, 4. Length of stream is $m = 8$
\item Number of distinct symbols $d=3$.
\item $\epsilon = \delta = 0.1$, estimate $\hat{d}$ so that \[
\Pr\left(\left|\frac{\hat{d}}{3} - 1\right| > 0.1\right) \leq 0.1
\]
\end{itemize}
}

my hope was that from transition 2 this would start but what actually happens is that you see two items and then none

what's the right way to do that?

samcarter_is_at_topanswers.xyz

You can add an offset, wait a sec

David Carlisle

@Anush no idea what's right but having [<+->] inside an \only<2> seems like it is going to be wrong.

samcarter_is_at_topanswers.xyz

\documentclass{beamer}


\begin{document}

\begin{frame}
\only<2->{

\begin{itemize}[<+(1)->]
\setlength\itemsep{0.3cm}
\item Stream: 5, 4, 5, 7, 4, 5, 7, 4. Length of stream is $m = 8$
\item Number of distinct symbols $d=3$.
\item $\epsilon = \delta = 0.1$, estimate $\hat{d}$ so that \[
\Pr\left(\left|\frac{\hat{d}}{3} - 1\right| > 0.1\right) \leq 0.1
\]
\end{itemize}
}
\end{frame}
\end{document}

@Anush ^^^

Anush

@DavidCarlisle it is all wrong as you say

David Carlisle

@Anush well I'd have guessed @samcarter_is_at_topanswers.xyz version was wrong as well, but I suspect she is right, she has used beamer before:-)

Anush

15:37

@samcarter_is_at_topanswers.xyz exactly perfect!Thank you

David Carlisle

@Anush oh no I see she changed it to \only<2-> that looks more reasonable:-)

samcarter_is_at_topanswers.xyz

@DavidCarlisle and added a (1) :)

@Anush You could achieve a similar effect by a simple \pause before the itemize

David Carlisle

@samcarter_is_at_topanswers.xyz it was the \only change I had missed, I didn't see how you could have an auto-increment on the items but still only show overlay 2

Anush

@DavidCarlisle it's a black art to me still. The (1) is pure genius

samcarter_is_at_topanswers.xyz

On a totally unrelated topic: does anyone know how to persistently disable the chat ping sounds? Using the "audio notification level" at the top of the page only works until cookies get deleted (or eaten)

Anush

15:41

have no speakers?(That's my option)

samcarter_is_at_topanswers.xyz

@Anush I used to have mine turned off most of the time, but with all these covid-19 telecons, I often forget to turn them off again and jump in my seat if there is a sudden ping ...

nbro

This code apparently draws a rectangle

\draw[gray,thin] ([xshift=-3pt,yshift=3pt]\X.north west) rectangle
([xshift=3pt,yshift=-3pt]\X.south east);

Joseph Wright

@samcarter_is_at_topanswers.xyz I don't think you can do both things, at least 'within' the page: cookies are how that sort of info is stored

nbro

This code is inside the loop

\foreach \X in {over,good,under}
{ RECTANGLE }

samcarter_is_at_topanswers.xyz

@JosephWright OK, thanks. User script then to the rescue

nbro

15:44

I would like to draw some text below each rectangle, but centered and the text depends on X

what's the easiest way?

samcarter_is_at_topanswers.xyz

@nbro The easiest way is to make a compilable code and not only fragments

nbro

@samcarter_is_at_topanswers.xyz I am using this code tex.stackexchange.com/a/485932/63097

comment the last lines with Time and Values

and then what I want to do is add text below each rectangle

Anush

@samcarter_is_at_topanswers.xyz I now have tikz questions on both sites. I think that makes me promiscuous

samcarter_is_at_topanswers.xyz

@Anush For random colours, you could use tex.stackexchange.com/questions/171481/…

Anush

cool

what I would really like are colors that are maximally far from each other in terms of perception

samcarter_is_at_topanswers.xyz

15:59

@Anush So not random colours.

Anush

@samcarter_is_at_topanswers.xyz I went for random as an easier proxy

samcarter_is_at_topanswers.xyz

@Anush You could define n equidistant colours in HLS space, this should give you the most different colours

David Carlisle

16:54

@samcarter_is_at_topanswers.xyz @JosephWright \beamer@sortzero \beamerx@\texttt ?

Ulrike Fischer

@DavidCarlisle ?

Martin Schröder

1

Q: The LaTeX project public license (LPPL), version 1.3

I've read through https://www.latex-project.org/lppl/lppl-1-3/ but I still don't really understand how this licence works. Can I use the "work" under this licence in a commercial product?

David Carlisle

17:18

@UlrikeFischer beamer changed the definition of \texttt in 2019 and x^\texttt{b} doesn't work (not that I mind about that too much) but I just woncer what it does, didn't check the source just \show\texttt

Paulo Cereda

user image

In the light of recent code excerpts in this chatroom...

@samcarter_is_at_topanswers.xyz oh my: polygon.com/2020/9/1/21410285/…

nbro

17:40

omg

```
Process started

Process exited with error(s)
```

thank you!!!

Alan Munn

@nbro This comment is about as insightful as the error it's complaining about...

nbro

so that you understand how much I feel when I am using latex

Alan Munn

@nbro Well there's a simple solution to that problem. Switch to Word and then you'll clearly have no trouble at all.

nbro

the good thing is that I get an error but an output is produced

It's like when you drop an atomic bomb

you get an output but also an error

mental error

but apart from these things, latex is not bad

could be better though

everything could be better, even my language

Anonymous

17:56

20 hours ago, by cis

0

A: Automated ruler - how to have one set of rulers around each picture, 2 pictures side by side on a page

The following uses tcolorbox (which based widly on TikZ) for all positioning tasks (no further packages are required here) and TikZ for the ruler-annotations. First: The unitlength \u should be determined like here. The method is based on to measure the dimensions of the raster boxes and thus to ...

Anonymous

How could I get rid of the horizontal spacing between the images and the blue lines?

Joseph Wright

@DavidCarlisle It allows action specs for font changes; can’t be done by expansion, so something had to give

@DavidCarlisle as the official LaTeX position is to require braces anyway, I felt this was something that was okay

David Carlisle

@JosephWright yes sure I'd already left a comment on the question that it was never expected to work, but I just wondered what was the actual change:-)

@nbro that isn't a latex message, so you are complaining about the wrong thing, in the wrong place.

nbro

18:15

so what error is that?

David Carlisle

@nbro no idea: you ran some program which presumably executed latex in the background and it's just telling you that failed. latex itself (assuming it started at all) will have made error messages on standard out and in the log file.

@nbro assuming "the process" was latex, it could be anything. You presumably know what program you were running.

Anush

18:30

@samcarter_is_at_topanswers.xyz that's a great idea

nbro

18:54

I just run pdflatex with the option to create the standalone pdf

David Carlisle

@nbro no you did not run pdflatex, you ran some other program which called pdflatex (or some other program) in the background and detected an error. The message you show is from some program that you have not mentioned.

nbro

"pdflatex" --shell-escape -synctex=1 -interaction=nonstopmode %.tex|open %.pdf

that's the command I executed on the editor

David Carlisle

@nbro so the editor you have not mentioned ran pdflatex (or the open command) in the background and detected an error. it would presumably give the same message for any command it ran that returned an error so the message is completely unrelated to latex

nbro

I don't understand to be honest how this is not related to latex if I am trying to compile a latex document with a latex compiler

anyway, maybe I will post a question

David Carlisle

@nbro the message comes from your editor not from latex.

@nbro it may be that latex had an error, if so the error message will be in the log file (weirdly you seem to be piping the output to open so you would not see any terminal output) but the message you show is not from tex it is from the editor

nbro

19:08

I compiled without --shell-escape and it produces the pdf even though I get another error, so it's fine, let's say, in the sense that now I get what I need

David Carlisle

@nbro If you get any error the pdf is most likely not usable. Also why did you have --shell-escape if you don't need it, you should avoid using that in almost all cases, certainly don't use it on anything of unknown source/

nbro

I wanted to create a pdf with only the tikzpicture (to be included in another latex doc)

but it did the trick even without it

maybe because I was using \documentclass[border=5mm]{standalone}

David Carlisle

@nbro why would you need shell-escape though?

nbro

I think I saw it somewhere, in a post

I was producing another tikzpicture as a pdf image with that command before, and I was not getting problems

David Carlisle

@nbro It gives any document that you copy from anywhere and run full access to any file on your machine that you can access, it can delete all your files, mail your password file to a foreign state, anything.

nbro

19:27

well, I think I trust pdflatex not to destroy my life, but sometimes I wasn't so sure :P

David Carlisle

@nbro if you use --shell-escape you absolutely should not trust it, that is why shell-escape is disabled by default

cis

19:49

2 hours ago, by Vincent Mia Edie Verheyen

How could I get rid of the horizontal spacing between the images and the blue lines?

:55417655

The images are v- and h-centered in the "rasterboxes / tcbitems". It depends on the image, whether there is a h-space. If they shall stick together, you could add halign=right to the left image and halign=left to ther right image. But note that the rulers aligned to the rasterboxes, not to the images. I don't know how to erase the outer h-space prober at this moment. After setting raster force size=false, you can use ` add to width=-5mm` in the tbcitems.

% arara: pdflatex
% arara: pdflatex
% arara: pdflatex
% arara: ghostscript: {  resolution: 166  , device: png16m}
\documentclass[a4paper, landscape]{article}
\pagestyle{empty}
\usepackage[showframe=false,
margin=20mm,
]{geometry}
%\geometry{paperwidth=15cm, paperheight=30cm, margin=2mm}% optional
%\usepackage{mwe} % Dummy Images
\usepackage{textcomp} % \textcopyright

\usepackage{tikz}
\usetikzlibrary{calc}
\pgfkeys{/tikz/savevalue/.code 2 args={\global\edef#1{#2}}}
%\pagecolor{lightgray!22} % see page margins

But thats not a proper solution

If you want to address this on the main page, I would recommend you to do it on the basis of a very simple example with a tcbitemize environment from which everything that has nothing to do with the whitespace problem has been removed; in other words: a minimal example.
People here tend to deal with small, simple examples, not with overall problems here (I was able to do that because I was familiar with the topic, others not),

1 hour later…

cis

21:03

It also interests me, so here:

0

Q: tcolorbox: How to set minimal sized rasterboxes at tcbitemize

I want the rasterboxes horizontally only as wide as the content (like in "section 1"). What have I to do? \documentclass{article} \usepackage[most]{tcolorbox} \tcbset{sharp corners, } \begin{document} \section{tight works here} \tcbox[size=tight,on line]{\Huge B} \section{tight works not horiz...

tcolorbox tcbitemize

nbro

21:46

Any help with this chat.stackexchange.com/transcript/message/55415787#55415787?

Ulrike Fischer

22:00

@MarcelKrüger hooray, the luaotfload travis tests passed ;-) unicode-math is back again.

Marcel Krüger

22:15

@UlrikeFischer Yeay! I think I also have a fix for the database issue.

cis

@nbro Your inquiries are sometimes complicated, the helper has to find out what needs to help.

Ulrike Fischer

22:26

@MarcelKrüger should it go into the release? Then I wait with the upload.

nbro

right

I explained above, but let me explain again

I am using that code in that link

and I want to place a label under (or above) the rectangles (for each rectangle, a different label). The labels need to be separate from the rectangles (i.e. some padding between the rectangles and labels)

when you execute that code, you will see the rectangles

Is that clear now?

Here's the code: tex.stackexchange.com/a/485932/63097

I guess this can be done with \node or \draw, but I am not sure how or what is the best way

Another problem that I have

I am using \only<1>{...} to create animations and I am using \note{} to add notes, but the notes are only added at the end of the last \only when using pdfpc. Is there a way to put them at the beginning?

nbro

22:47

0

Q: How to make the notes (created with the \note command) appear before the animations (created with the \only command)?

I am using the following code \usepackage{pgfpages} \setbeameroption{show notes} \setbeameroption{show notes on second screen=right} \begin{document} ... \notes{ here the notes go after \only<2>{...} } \begin{frame}[fragile]{My title} \only<1>{ first part of animation } \only<2>{ second part ...

beamer notes pdfpc

Marcel Krüger

22:59

@UlrikeFischer I think that would be good, especially since that as been reported twice now and it might also be relevant for the containerization use cases that recently came up a lot.

samcarter_is_at_topanswers.xyz

23:30

@nbro If you want notes to correspond to overlays on a frame, use them inside this frame

nbro

23:48

@samcarter_is_at_topanswers.xyz thanks, that seems to do the trick

I didn't know I could put the notes inside the frame

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