Questions tagged [programming]
{programming} is about how (La)TeX can be used as a programming language.
4
votes
2answers
68 views
keyval - function for keyB should act dependent on value of keyA - how to do this?
I'm new to LaTeX. I learn and I use article class. I struggle learning working with keyval package:
I try to write macro \macro which only uses one mandatory argument where user can provide key value ...
8
votes
2answers
487 views
Mark command as obsolete
Is it possible to declare some command inside a package as obsolete? I work on a package and want to inform users that in the next version of the package this commands will be deleted. What kind of ...
2
votes
1answer
31 views
Reading an input word in an array and then processing character by character
For some application, I need to read input tex file word by word (not necessarily as arguments of any command), and then to print each word after changing the positions of some characters within the ...
6
votes
1answer
74 views
Does \expanded replace the \romannumeral trick for expansion?
TeXLive 2019 is here :D
One of its awaited features is the new \expanded primitive now available in all of the main engines (only available in LuaTeX in previous years) thanks to Joseph Wright.
What ...
4
votes
1answer
41 views
Changing a tcolorbox listing option based on the number of lines of its listing
Consider the following code which produces listings:
% ---------------------------------------------------------------------------- %
% Preamble
\documentclass[12pt]{article}
% -----------------------...
0
votes
1answer
46 views
Is there a way to define \xmat*{M}{n}{m} in the physics package
As titled, I want the command\mqty(\xmat*{M}{n}{m}) to generate a matrix like this:
$$
\begin{pmatrix}
M_{ 11 } & M_{ 12 } & M_{ 13 } & \cdots & M_{ 1m } \\
M_{...
2
votes
1answer
63 views
Dynamic row spacing if total character is variable
I use datatool to get data and row spacing can change.
Count word/character of Total character of (Text A + Text B) if:
Total charater of (Text A + Text B) < 20 characters => set row space of ...
5
votes
3answers
138 views
\numexpr behavior in math mode and/or TikZ
I am attempting to create a triangular grid of numbers like shown below:
This was created in TikZ by hard-coding each point, but I would like to generate the grid procedurally so I can make ...
0
votes
0answers
21 views
LaTeX - Pass variable into a string [duplicate]
In LaTeX I am trying to pass a variable into a line for the \progressbar.
If you type everything in it looks like this
\progressbar[linecolor=blue, filledcolor=green]{.25} \begin{picture}(0,0)\put(-...
0
votes
0answers
49 views
Embedded picture with separate coordinate system (Tikz)
Am using Tikz, and have a slightly complicated drawing. Now I want to replace a rectangle in a certain place with a more sophisticated shape. This shape I have in SVG format, and I want to replace the ...
3
votes
1answer
47 views
Use array/list/sequence for repetitive code?
For a PhD thesis cover template in our university, there is some code as follow:
%%% Jury member n1 (Président) %%%
\newcommand{\jurynameA}{M. Cabot}
\newcommand{\juryadressA}{Someplace}
\newcommand{\...
2
votes
1answer
49 views
How to expand condition on \IfEqCase before evaluation?
I'm trying to do a simple task (as in the MWE below). When a given text is given (a filename) it outputs a given color.
To work as I intended, \IfEqCase should only evaluate the file extension, as ...
2
votes
2answers
85 views
Know in which column am I in [closed]
it there a way to have a variable that returns in which column of my multicols environment am I in?
Thanks!
0
votes
0answers
30 views
Is it possible to `\include`/`\input` a text depending on the language set on babel or polyglossia
I would like to know if it is possible to conditionally require, in a given document, the inclusion of a chapter or the input of a particular piece of text, depending on the language set on babel or ...
3
votes
2answers
49 views
Special treatment for first and last items in \seq_map_inline
It is rather common to have to apply special treatment for first and last items of a sequence. I wonder what the best ways to treat these cases in expl3's \seq_map_inline.
For instance, suppose I'd ...
2
votes
2answers
89 views
How can I wrap this hard-coded image gallery into a new environment?
I'm building a gallery using tabularx and tikz, similar to image-gallery. Here's a snippet:
\documentclass{article}
\usepackage{tikz} ...
0
votes
0answers
39 views
Generalization of progressive downscaling of fontsize
Although the answers to How can I progressively scale letters? are functional in the restricted context of the post, I would like to extend it by asking for a programmatic solution to the more general ...
2
votes
1answer
84 views
Reflection in ConTeXt
The answer to ConTeXt: avoid enumeration items across pages was a nice introduction to modifying TeX before rendering, like HTML with JavaScript.
\startsetups [userdata:itemize]
\setbox\scratchbox\...
1
vote
1answer
54 views
Input variable as argument in metapost script?
I would like to pass input parameters into my .mp script.
For example, instead of running:
mpost script.mp
I want to run something like:
mpost script.mp 1 1 2 diamand
Where "1 1 2 diamond" are 4 ...
2
votes
1answer
47 views
Extend book class with options of multiple values
I am writing a class based on book.cls, to which I want to have an option that is a list, so I can do
\documentclass[languages={french, english}]{testops}
I have define the key using l3key2e. But it ...
0
votes
1answer
69 views
Convert TeX to a standard equation string [closed]
I'm currently programming in Javascript, I figured this would be the best place to put it. I'm very very new to TeX, in fact I discovered it within the past hour. I was wondering if I could convert ...
2
votes
1answer
29 views
\centering leads to cascade of errors
Context: I'm developing a title page (writing my own titlepage environment) and I'm writing my own \thanks command (to give me control over where I spew the footnotes). Not knowing how \footnote does ...
3
votes
1answer
195 views
Processing a math paper written in TeX to generate a summary
I'm interested in writing a program that can automatically process math papers written in TeX in order to generate summaries. I have partly finished one written in Python but it does not seem to work ...
5
votes
2answers
124 views
Macro losing value when exiting custom environment
I'm trying to define my own custom environment, and ran into this problem: When I set a macro inside the environment's start code, that macro loses its value at the end of the environment.
To be more ...
0
votes
1answer
31 views
Designing the programming list block in LyX
I'm new to LyX. I'm trying to create a programming block of some PL which looks like in the picture bellow:
Tried to look for some similar threads, bud didn't find any.
How can I make make the ...
0
votes
1answer
87 views
LaTeX error: illegal parameter number in definition of \pgffor@b
I am trying to use a loop. The following does not work:
\foreach \a in {no,has}{
\begin{table}[H]
\footnotesize
\captionsetup{width=.9\linewidth}
\caption{text}
\vspace{-22pt}
...
3
votes
3answers
175 views
How to more efficiently get code like this?
I have a folder containing files like these,
2007.pdf
2007_Q1.pdf
2007_Q10.pdf
...
2007_Q5.pdf
2007_Q6.pdf
2007_Q7.pdf
2007_Q8.pdf
2007_Q9.pdf
2008.pdf
2008_Q1.pdf
2008_Q10.pdf
2008_Q11.pdf
2008_Q12....
2
votes
1answer
70 views
How to rewrite the looping below with nested ifelse operators?
Could you rewrite the looping part just with nested PostScript ifelse operators?
\documentclass[pstricks,border=1cm]{standalone}
\makeatletter
\def\scale{%
\psline(100,0)
\foreach \x in {0,...
4
votes
2answers
324 views
“Incomplete \ifcase” error depends not on the \ifcase but the integer at which it's evaluated
I have a puzzling Incomplete \ifcase; all text was ignored after… error in that the same \ifcase is fine if I evaluate it at the largest integer for which it's defined, but if I evaluate it at a ...
4
votes
1answer
166 views
How can I change the number of iterations from 11 to 3?
The simplified example given below currently uses 11 iterations just for drawing at most 3 stems (vertical segments). It seems that my code is not efficient enough so I want to reduce the number of ...
2
votes
1answer
44 views
Why does arrayjobx return the wrong elements of the bi-dimensional matrix I defined?
In the following MWE, I use package arrayjobx to define a 2x3 array \RowPayoffs, where I assign each element its value by referencing its (row, column). Specifically, I define \RowPayoffs(i,j)={Rij}, ...
3
votes
0answers
46 views
Efficiently setting category code for a range of characters
I kept thinking about using Cyrillic characters in command names with PDFTeX engine. It looks to me so far that if I stay with 8-bit encoding and assign category code 11 to all Cyrillic letters ...
1
vote
2answers
506 views
Node above other node fails with “cannot parse this coordinate”
I'm Alex stuying automation engineering and have to write my master thesis with tex. Until now, I haven't really used tikz or used a program to draw graphics and exported them to tikz. Now for the ...
1
vote
1answer
71 views
Save command result in other command
I am getting a value by a command. Now I am temporarily changing a saved variable which changes the command output. After I finished some code I want to reset the stored value if the value before the ...
1
vote
0answers
52 views
Processing latex? Ie get text bounding boxs etc
Im looking at the possibility of processing a latex document to get coordinates of element off the page.
For example if I want to get the coordinates of an image, or a heading off a page and output ...
0
votes
0answers
72 views
Look-ahead on token stream?
Is it possible to have a macro check, if it is followed by a given pattern of tokens and produce different expansions depending on it?
So far I have tried using code such as
\def\conditionalAction#1#...
1
vote
1answer
114 views
Why are my exercise and answer references reading 10 (ten) too many?
%-------------------------------------------------------------------------- %
\documentclass[english]{book}
%-------------------------------------------------------------------------- %
%
\usepackage[...
5
votes
2answers
262 views
How to test if an expl3 function argument is an integer expression?
How can I test if an argument supplied to an expl3 function is an integer expression? If it's not and I call any integer related function an error is generated (! Missing number, treated as zero.). I'...
4
votes
2answers
120 views
Use N type for own macros
Background
In LaTeX3 I’m programming some macros to store and read contents from a variable like \tl_set:Nn does. An thus I’m generating variants using the N type, which causes a warning. The warning ...
2
votes
1answer
33 views
Token list of counter values
I am trying to collect certain counter values in a list of tokens. Here is my naive attempt:
\documentclass{article}
\newtoks\list
\list={}
\def\addtolist#1{\global\list=\expandafter{\the\list #1}}
...
5
votes
4answers
191 views
Unwanted spaces in user defined structures and the uses of % [duplicate]
This question arise from my recent activity on user defined commands of various kind. In the answer to a recently posed question, @egreg pointed out to me the importance of not forgetting a % after ...
5
votes
1answer
122 views
LaTeX3 pad something unexpandable
I'm trying to implement the Gray code in LaTeX. The current setup works and outputs the following (the commas are for visual distinction):
(intended output:) 0,1; 00,01,11,10; 000, 001, 011, 010, 110,...
0
votes
0answers
84 views
How to update my own packages?
At the moment I am starting to organize my documents a little bit better. For this reason I want to externalize some of my code into packages. Some of these are rather stable but some have to be ...
2
votes
1answer
263 views
Options in custom class [duplicate]
Consider the following class:
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{sampleclass}
\LoadClass[
paper=a5,
chapterprefix=true
]{scrbook}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{scrbook}}
\...
8
votes
4answers
326 views
How to trim a certain part of each character in a whole document?
Got inspired from a nice article titled "why All Caps is so hard to read", I want to produce the following result for my document.
MWE
\documentclass[preview,border=12pt,varwidth]{standalone}
\...
1
vote
1answer
172 views
Execute external bash file
This is a follow up to Get write18 to execute after file parsing
With the code
\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx,grffile}
\newcommand{\filename}...
1
vote
1answer
61 views
Get write18 to execute after file parsing
Follow up to Get write18 to accept / expand command
I want to crop a pdf and print it. My \the\pdfshellescape is 1, so my shell-escape is working. My MWE is
\documentclass[a4paper,10pt]{article}
\...
4
votes
1answer
169 views
Get write18 to accept / expand command
I am trying to use write18 to crop a pdf. The code is
\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\newcommand{\filename}{}
\newcommand{\croppedfilename}{}...
1
vote
1answer
47 views
expl3: lowercase sequence elements with line break breaks
I have some short text (book author names) stored in a sequence. Some author names are long, and therefore I have to insert manually a line break (\\). In a specific case, I have to typeset these ...
2
votes
1answer
55 views
Break out of current scope [closed]
Consider the following pseudo-code:
{
Instruction 1
If condition -> break
Instruction 2
}
Do some more stuff
Is there a way to do something like this in LaTeX? I am referring to the ...
