Questions tagged [directlua]
The directlua tag has no usage guidance.
68
questions
0
votes
1
answer
71
views
[\directlua]:1: ')' expected near <eof>
In most cases I get this error: [\directlua]:1: ')' expected near .
I want to calculate
\Abs{((\bx-\ax)*(\cx-\ax)+(\by-\ay)*(\cy-\ay))/(809.55841)} and then round up
\documentclass[margin=1cm]{...
- 92.3k
0
votes
1
answer
45
views
LuaLatex: create tabularx with multiple direclua
I'm using LuaLatex to create a tabular, but it work only if the entire tabular is created inside a single directlua.
Why does the former work but not the latter ?
This work
\directlua{
tex.print(&...
- 15
2
votes
5
answers
121
views
obtaining a substring with \directlua when original string contains %-character
I want to implement in LaTeX a sort of function with two parameters
a String containing a percentage e.g. "3.20 %"
an integer, e.g. 2000
The result should be the product of both numbers (in ...
1
vote
1
answer
50
views
TikZ---reading coordinates from an external file
I am trying to draw a picture with inputs from a bunch of csv files.
Let's take the case where the content of the file is a simple tuple of floats:
>>> cat coords/right_corner.csv
8....
- 253
4
votes
1
answer
88
views
Issue with percent signs in luacode (LuaLaTeX)
My example doesn't work at this location string.find(s:sub(1, 1), "%a").
How to fix it?
MWE:
% !TeX program = lualatex
% !TeX encoding = utf-8
%===============================================...
- 936
4
votes
1
answer
148
views
Understanding implicit error on a recursive function
I was originally following the idea from Garrick Peschke
To import all .tex files inside a folder, but I want my Lua function to also search inside subfolders.
Unfortunately I can't make the Lua ...
- 43
0
votes
1
answer
30
views
Pgfkeys .code and \directlua problem
Comment the 2 lines alternativelly, one works the other doesn't :
\documentclass{beamer}
\begin{document}
\pgfkeys{/Baq/.cd ,
nb/.default = 10,
nb/.store in = \nb,
nb,
contraintes/....
- 16.7k
0
votes
1
answer
47
views
[\directlua]:1: invalid escape sequence - a no \string solution please
I have to pass different strings from latex to lua as arguments.
I have a solution for an argument in a command, but in case of pgf keys, it seems not working. Use \string is not suitable, if it looks ...
- 16.7k
1
vote
1
answer
51
views
Why is `tex.sprint` deferred when handling `process_input_buffer`?
%!TEX program=lualatex
\documentclass{article}
\begin{document}
\def\specialRead{\directlua{
luatexbase.add_to_callback('process_input_buffer', function (line)
if line:find('^\\...
- 391
1
vote
1
answer
114
views
Drawing 2d and 3d vectors using lua or luamplib in LaTeX
Here is the tikz code using which vectors can be drawn.
\documentclass{article}
\usepackage{tikz}
\usepackage{tikz-3dplot}
\usepackage{amsmath}
\begin{document}
\tdplotsetmaincoords{60}{120}
\begin{...
- 1,463
1
vote
1
answer
89
views
How can I get babel to use a fallback font when a special character is missing from the main font?
Sometimes there is a character in my text that is not in the main font, such as Chinese characters or emojis, etc. and I do not want to constantly modify this in the text with various commands to ...
- 13
1
vote
1
answer
65
views
Pass string with escape characters and comma through xkeyval package while compiling the document with LuaLaTeX
The following is the code of the file temptest.sty
\ProvidesPackage{temptest}
\RequirePackage{amsmath,amssymb}
\RequirePackage{xkeyval}
\RequirePackage{luacode}
\begin{luacode*}
function myfunc(m,n)
...
- 1,463
1
vote
2
answers
47
views
Alignment Gets changed in tabular environment on adding argument in lua function on compiling with LuaLaTeX
The following code works and gives expected output with expected alignment.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function myfunc()
str2=[[$1$ & $2$ & $3$ & $4$ &...
- 1,463
0
votes
1
answer
40
views
macros avoid linebreak if macro expands to nothing
I know this one is quite similar to this post (from me). But even with using % all over the place and \ignorespaces there is still a linebreak.
See my mwe: (main2.tex)
\documentclass{article}
\...
- 493
2
votes
1
answer
313
views
How do you select individual end alternate/swash characters with LuaLaTeX and fontspec?
Basic Problem Statement
I would like to enable some (but not all) stylistic alternate ".end" characters from an OpenType font, on condition that they replace terminal characters in a word.
...
- 123
1
vote
1
answer
139
views
Table CHAR alignment in XML
I have successfully loaded XML in LuaLaTeX with XML-Tables based on this example
Count Number of Columns in XML.
I have need the table alignments from tbody instead of thead. And how to define ...
- 2,218
1
vote
1
answer
51
views
Figure Text in same Document with Anchor Tag
I had referred this link: Create Separate File using LuaLaTeX
But i have need in the same document.
I would like to give anchor tags in the figure caption and move the figure caption text in the top ...
- 2,218
1
vote
1
answer
134
views
Can I make a macro behave like \numexpr?
For example I define \fpeval in Plain LuaTeX:
\begingroup
\catcode`\%=12
\directlua{
function math.round_int ( x )
return x>=0 and math.floor(x+0.5) or math.ceil(x-0.5)
end
function ...
- 1,138
2
votes
2
answers
168
views
\let\mySection\section with directlua
Next lualatex MWE emulates \newcommand\mySection{\section} on the lua side.
% !TEX TS-program = lualatex
\documentclass{article}
\begin{document}
\directlua{
token.set_macro('mySection', '\\section')...
- 776
0
votes
1
answer
47
views
Fixing error during collection of all boxes
i tired the code from this answer to arrange images loaded by includegraphics but got some errors i can not fix. the following code
module(...,package.seeall)
local function get_boxes(parent)
local ...
- 2,869
3
votes
1
answer
69
views
Command calls LuaLaTeX function, backslash in argument [duplicate]
I would like to create a command that simply prints what I give to it, but through Lua. Pointless for now, but I want to expand this to a more complex use-case. I've read a few answers around here, ...
- 1,362
1
vote
1
answer
424
views
Use unicode COMBINING LOW LINE (U+0332) as underline
In the same vein as Using unicode "combining right arrow above" to generate vector command, I’d like to use U+0332 “ ̲” as a “graphical” alias for \underline.
I don’t know Lua, so I’m not ...
- 1,296
2
votes
1
answer
117
views
Can I make \directlua understand unicode chars like ≥, ≤, ≠, ∙, and −?
MWE:
\directlua{%
local abs=math.abs
function gcd(x, y)
if y \csstring\~= 0 then
return gcd(y, x \csstring\% y)% I would like to write "≠" instead of "~=".
else
...
- 1,138
1
vote
1
answer
132
views
Problem writing to file through \directlua in a memoir class document
Below is a minimal example of some code where the memoir class seems to collide with Lua code, executed within a \directlua command, that writes to an external file.
Can anyone help me figure out the ...
- 51
1
vote
1
answer
201
views
Syntax error in LuaLaTeX \directlua code
I have the below document that I try to compile with LuaLaTex (using the MiKTeX package).
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\begin{document}
\expandafter\...
- 269
3
votes
1
answer
398
views
LuaTeX: lua best coding practices
What are some of the best coding practices to follow when splitting and loading lua code from multiple external lua files, and dealing with lua code from other lualatex packages. This thought comes to ...
- 1,246
0
votes
0
answers
40
views
Unwanted spacing between text and tikzpicture caused by "non-visual" code lines
I want to show some subgraphs of a certain graph. I want them side by side and labeled.
This is what I've got:
I can't provide working LaTeX-code, since I have implemented the graphdrawing ...
- 13
3
votes
2
answers
236
views
How to pass macro arguments (#1, #2, ..) to Lua variables
This question is probably trivial, but I started exploring Lua(La)TeX a couple of hours ago so bear with me.
The MWE is the following:
test.tex:
\documentclass{article}
\directlua{require("test....
- 2,034
0
votes
1
answer
70
views
Problem using macros in directua [duplicate]
I have the following external lua script:
-- file mylua.lua
function test(input)
tex.sprint(input)
end
And the following lualatex document:
\documentclass{article}
\usepackage{luacode}
\directlua{...
- 7,945
1
vote
0
answers
87
views
Incompatibility between LuaLatex font feature and Graphite?
when I use LuaLaTeX to modify my font (for example here kerning) at the same time as Graphite, there seems to be a problem because nothing happens. Everything seems to go well when I'm not using ...
- 427
2
votes
1
answer
603
views
Define an incremental counter with Lua
I would like to receive a suggestion for this example. Really, it is more a question related to Lua scripting.
Minimal working example
\documentclass{beamer}
\directlua{dofile("timer.lua")}
...
- 359
2
votes
1
answer
386
views
MathML Format XML in Lua
I have successfully loaded XML in LuaLaTeX. But how to load MathML. Any Lua Modules are available?
My LaTeX file:
\documentclass{article}
\usepackage{luacode}
\begin{luacode*}
xml = require('luaxml-...
- 95
2
votes
1
answer
88
views
Importing luaqd library in LuaTeX
I am looking for easy way to importing lqd or some other similar library in LuaTeX so that It can used in LaTeX. The lmapm library is wriiten by Luiz Figueiredo, one of the authors of the Lua ...
- 1,463
5
votes
2
answers
1k
views
Incorrect value of Pi in Lua after 16th Decimal Place
The following is the code.
\documentclass{article}
\usepackage{luacode}
\begin{document}
\luaexec{tex.sprint(string.format('\%.20f', math.pi))}
\end{document}
It gives the output as
3....
- 1,463
1
vote
1
answer
125
views
Setting Environment while defining complex numbers in LuaTeX
My question is inspired from this question that I asked earlier. Here is the code.
\documentclass{article}
\usepackage{parskip,luacode}
\begin{luacode*}
M = {} -- the module
complex = {} -- ...
- 1,463
2
votes
1
answer
518
views
Evaluating Mathematical Expressions in Lua
Here is the code.
\documentclass{article}
\begin{document}
\directlua{tex.sprint(tostring(math.sin(math.pi)))} \\
\directlua{tex.sprint(tostring(math.tan(math.pi/2)))}
\end{document}
I am expecting ...
- 1,463
4
votes
1
answer
151
views
Trouble while giving input from tex.sprint function to another function in LuaTeX
I have the set.lua file with the following code.
local Set = {} --module
local mt = {} --metatable
function Set.new (l)
local set = {}
setmetatable(set, mt)
for ...
- 1,463
2
votes
1
answer
207
views
Error when Metatable is set for global environment in Lua LaTeX
I have the set.lua file with the following code.
local Set = {} --module
local mt = {} --metatable
setmetatable(_G,{__index=function(t,k) return k end})
--some functions
return Set
...
- 1,463
2
votes
1
answer
134
views
siunitx table, formatting \directlua{} ouput
I have a table with values calculated with \directlua{}.
They are formatted with siunitx columns.
I want to turn some values bold or change their color.
It appears that the output of \directlua{} ...
- 111
3
votes
1
answer
238
views
Gregorio - Glyph missing?
I've just updated to TexLive 2019 on Mac and then Gregorio 5.2.1.
This is the file I'm trying to compile (with my past distribution of TexLive 2018):
% !TEX program = LuaLaTeX+se
% !TEX encoding = ...
- 33
3
votes
2
answers
740
views
I wish to set PDF metadata from within LuaTeX
I found out how to implement the Lua code for setting PDF metadata. I have failed.
My code:
\directlua0{
pdf.setinfo ("Title", "Naked Cheerleaders on Crack")
pdf.setinfo ("...
- 91
4
votes
1
answer
536
views
transform a scientific notation to decimal notation with lua
The next code gives 5e-05 with \luaveclen{0.00003}{0.00004} but I need a decimal How to get a decimal notation ?
\def\luaveclen#1#2{
\directlua{
x = #1;
y = #2;
r=(x*x+y*y)...
- 92.3k
3
votes
2
answers
355
views
How can I use \n in \directlua{} to replace empty lines
Let’s assume I have a file file.txt containing
This is
a test
and I want to replace the contents (from within TeX) with
This is\par a test
I tried to use Lua but stuck with the \n in the ...
- 54.8k
15
votes
2
answers
979
views
Different answers of calculations in LuaLaTeX on local computer, lua compiler and on overleaf
Here is the code. It makes use of the file matrix.lua available at the following link.
https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua
The following code is to be run by matrix.lua ...
- 1,463
0
votes
0
answers
185
views
Issue with xparse and lualatex
I have the following code
\documentclass{article}
\usepackage{luacode,xparse,amsmath}
\begin{luacode*}
local matrix = require "matrix"
local complex = require "complex"
function add(m,n)
m=...
- 1,463
1
vote
1
answer
205
views
Nesting of functions not working in lualatex
Here is the code. It makes use of the file matrix.lua available at the following link.
https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua
\documentclass{article}
\usepackage{luacode}
\...
- 1,463
0
votes
1
answer
216
views
Using output of one lua function as input of another function in tex file
The following is the code.
\documentclass{article}
\usepackage{luacode}
\begin{document}
\begin{luacode*}
function string(x)
tex.sprint(x)
end
function combine(x,y)
tex.sprint(x.." "..y)
end
\end{...
- 1,463
4
votes
2
answers
171
views
Bug in Lualatex: not printing characters from calculation
I have the following code
\documentclass{article}
\usepackage{luacode}
\begin{document}
\begin{luacode*}
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return ...
- 1,463
2
votes
2
answers
522
views
How to pass array of values in lualatex?
Here is code for matrix multiplication.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function MatMul( m1, m2 )
if #m1[1] ~= #m2 then
return nil
end
local ...
- 1,463
9
votes
1
answer
682
views
Finding Greatest Common Divisor using LuaLatex
Here is my code to find Greatest Common Divisor of two positive integers.
\documentclass{article}
\usepackage{luacode}
\begin{luacode}
function gcd(a,b)
if b ~= 0 then
return gcd(b, a % ...
- 1,463