Questions tagged [programming]
{programming} is about how (La)TeX can be used as a programming language.
0
votes
0answers
23 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
33 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
88 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
36 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 ...
1
vote
1answer
69 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
35 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
36 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 ...
3
votes
0answers
50 views
Is it possible to build a pgf key?
Wondering if it is possible to do something like the below, ie. build the keypath using arguments or similar:
\def\mymacro#1#2{%
\pgfkeysvalueof{/someprefix/#1/#2}%
}
\pgfkeyssetvalue{/someprefix/...
0
votes
1answer
51 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
28 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
179 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
117 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
24 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
64 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
166 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
62 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
256 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
160 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
36 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}, ...
2
votes
0answers
35 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
228 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
50 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
48 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
48 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
82 views
Why are my exercise and answer references reading 10 (ten) too many?
%-------------------------------------------------------------------------- %
\documentclass[english]{book}
%-------------------------------------------------------------------------- %
%
\usepackage[...
5
votes
2answers
234 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
112 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
28 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
188 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
117 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
81 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
189 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
322 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
87 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
45 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
156 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
43 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
52 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 ...
3
votes
2answers
134 views
Question about macro parameter expansion
This question is just for my own understanding of how expansion works.
I'm using the siunitx package in a document. In order to make sure that I'm consistant with myself, I try to write results of ...
0
votes
1answer
42 views
Toggle numbering method for theorem-like environments depending on nesting in a section or subsection
I have been thinking of letting the sections determine the numbering style of theorems and such, in the following sense. If there are subsections, the enumeration should be section.subsection.number, ...
0
votes
0answers
67 views
Why are there so many non-composable commands in (La)TeX?
Basically every time I start to do something non-trivial and try to remove repetition, I run into problems with non-composability of commands. Why are there so many non-composable commands in (La)TeX?
...
6
votes
1answer
129 views
Is it a bad idea to make a command with the same name as an environment?
So I have defined an environment {sseqpage} where the body of the environment consists of options to control the appearance of an image. If no body is present, then the image can still be displayed ...
2
votes
2answers
111 views
Put a unique code on every page
I want to create a form that will be later filled on paper. Some fields though are filled automatically (i. e. printed already when person receives a form).
Here is an MWE for the form itself:
\...
2
votes
2answers
62 views
How to reverse the path direction of \psframe?
I think there is a bug in \psframe that behaves differently when we compare it with other closed curves in PSTricks.
The path direction of \psframe seems to be clockwise while that of other closed ...
2
votes
3answers
67 views
How to rename a dynamically created macro?
I can use \let to rename
\curvepnodes to \ParametricNodes,
\Pnodecount to \LastIndexP as follows.
However, because \Pnodecount is generated dynamically inside \curvepnodes, I cannot move \let\...
0
votes
0answers
109 views
Compute image ratio based on the largest picture available in the document
Following this question I asked a few years ago, I'm looking for a way to find the width of the largest picture (in width) in my document.
Typically, this requires a for loop and some TeX programming....
5
votes
3answers
129 views
Does TikZ offer a concise way to test for membership in a specified set?
Does TikZ offer a reasonably native/concise way of expressing 'if the loop variable is an element of this set, then...'?
Remarks.
An example for what I am asking for is the pseudo-code
\...
6
votes
2answers
316 views
Why does this naming of nodes via a foreach loop result in an error message even though it seems that the naming works partially?
Question.
Why does
\documentclass{amsart}
\usepackage{tikz}
\usetikzlibrary{calc}
\begin{document}
\begin{tikzpicture}
\foreach \index in {0,1,2,3}{
\node (v\index) at (\index cm, \index cm)[...
2
votes
1answer
173 views
Changing a variable within a chapter title, memoir class
I'm trying to alter the memoir \chapter command by redefining e.g. \afterchaptertitle. I'd like starting a new chapter to change the value of a Latex variable, so that the following chapter definition ...
6
votes
1answer
119 views
Programming convention in LaTeX: top-to-bottom or bottom-to-top?
When writing a package, should one use the top-to-bottom approach or bottom-to-top?
For example, the following two methods (in expl3 syntax)
% Top-to-bottom
\NewDocumentCommand \foo {m} { \...
