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Bug in Lualatex: not printing characters from calculation

LuaLaTeX pass characters without “ ” to luaProblem printing LaTeX from lua in lualatexSymbol not found error when using Lua C .so module with LuaLaTeXnon-printing characters in the OpenType layout of LuaLaTeXLuaLaTeX output from tex.print not interpretedcsquotes conflicts with quotation marks in Lua codeHow shall I launch from lualatex a lua program contained in a lua variable?Load fields from JSON file using LuaLatexHow to use lua code from external file in lualatex?Lualatex function producing trailing characters

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

4

I have the following code

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(matrix.det(cmatrix(m)))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

Here I am using matrix.lua and complex.lua from the following links.

https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua

https://github.com/davidm/lua-matrix/blob/master/lua/complex.lua

The expected answer is -3-24i. However it gives the answer -3-24. The character i is not printed. This works well in lua itself. But it seems to be a bug in lualatex. How can it be over come? Any help will be appreciated.

luatex matrices lua luacode directlua

share|improve this question

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  copy matrix.lua and complex.lua from the given links to the working folder. Then compile with lualatex.
  
  – user61681
  Jul 24 at 14:26
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Rather than a bug in LuaTeX, I'd suspect a bug in complex.lua first.
  
  – egreg
  Jul 24 at 14:27
  

  
  
  
  

add a comment | 

4

I have the following code

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(matrix.det(cmatrix(m)))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

Here I am using matrix.lua and complex.lua from the following links.

https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua

https://github.com/davidm/lua-matrix/blob/master/lua/complex.lua

The expected answer is -3-24i. However it gives the answer -3-24. The character i is not printed. This works well in lua itself. But it seems to be a bug in lualatex. How can it be over come? Any help will be appreciated.

luatex matrices lua luacode directlua

share|improve this question

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  copy matrix.lua and complex.lua from the given links to the working folder. Then compile with lualatex.
  
  – user61681
  Jul 24 at 14:26
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Rather than a bug in LuaTeX, I'd suspect a bug in complex.lua first.
  
  – egreg
  Jul 24 at 14:27
  

  
  
  
  

add a comment | 

I have the following code

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(matrix.det(cmatrix(m)))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

Here I am using matrix.lua and complex.lua from the following links.

https://github.com/davidm/lua-matrix/blob/master/lua/matrix.lua

https://github.com/davidm/lua-matrix/blob/master/lua/complex.lua

The expected answer is -3-24i. However it gives the answer -3-24. The character i is not printed. This works well in lua itself. But it seems to be a bug in lualatex. How can it be over come? Any help will be appreciated.

luatex matrices lua luacode directlua

share|improve this question

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(matrix.det(cmatrix(m)))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

share|improve this question

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

share|improve this question

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

asked Jul 24 at 14:14

user61681user61681

50922 silver badges1212 bronze badges

2 Answers
2

active

oldest

votes

6

There seems to be an issue in how tex.sprint interprets complex numbers. As a solution, you can convert it to a string before printing:

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(tostring(matrix.det(cmatrix(m))))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

share|improve this answer

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks for fast and correct explanation.
  
  – user61681
  Jul 24 at 14:30
  

  
  
  
  

add a comment | 

6

Unlike the Lua print function, which implicitly applies tostringto its argument, tex.sprint is defined to print each entry of a table separately if its argument is a table. The complex number is a two item table with the real and imaginary part with a custom tostring function that adds the i.

So print(matrix.det(cmatrix(m))) invokes tostring and prints -3-24i but tex.sprint applies the normal numeric tostring to each element of the table separately so prints -3 then -24. If you explicitly apply tostring before calling tex.sprint then the function specified for the complex number table will be used, resulting in "-3-24i" again.

share|improve this answer

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges

add a comment | 

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6

There seems to be an issue in how tex.sprint interprets complex numbers. As a solution, you can convert it to a string before printing:

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(tostring(matrix.det(cmatrix(m))))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

share|improve this answer

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks for fast and correct explanation.
  
  – user61681
  Jul 24 at 14:30
  

  
  
  
  

add a comment | 

6

There seems to be an issue in how tex.sprint interprets complex numbers. As a solution, you can convert it to a string before printing:

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(tostring(matrix.det(cmatrix(m))))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

share|improve this answer

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Thanks for fast and correct explanation.
  
  – user61681
  Jul 24 at 14:30
  

  
  
  
  

add a comment | 

There seems to be an issue in how tex.sprint interprets complex numbers. As a solution, you can convert it to a string before printing:

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(tostring(matrix.det(cmatrix(m))))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

share|improve this answer

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

documentclassarticle
usepackageluacode
begindocument
beginluacode*
local matrix = require "matrix"
local complex = require "complex"
function cmatrix(n)
return matrix(n):replace(complex)
end
function det(m)
tex.sprint(tostring(matrix.det(cmatrix(m))))
end
endluacode*
newcommandmatrixdet[1]directluadet(#1)
matrixdet1,2,3,4,5,6,"7+8i",8,10
enddocument

share|improve this answer

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

answered Jul 24 at 14:28

MarijnMarijn

11.2k11 gold badge66 silver badges4040 bronze badges

6

Unlike the Lua print function, which implicitly applies tostringto its argument, tex.sprint is defined to print each entry of a table separately if its argument is a table. The complex number is a two item table with the real and imaginary part with a custom tostring function that adds the i.

So print(matrix.det(cmatrix(m))) invokes tostring and prints -3-24i but tex.sprint applies the normal numeric tostring to each element of the table separately so prints -3 then -24. If you explicitly apply tostring before calling tex.sprint then the function specified for the complex number table will be used, resulting in "-3-24i" again.

share|improve this answer

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges

add a comment | 

6

Unlike the Lua print function, which implicitly applies tostringto its argument, tex.sprint is defined to print each entry of a table separately if its argument is a table. The complex number is a two item table with the real and imaginary part with a custom tostring function that adds the i.

So print(matrix.det(cmatrix(m))) invokes tostring and prints -3-24i but tex.sprint applies the normal numeric tostring to each element of the table separately so prints -3 then -24. If you explicitly apply tostring before calling tex.sprint then the function specified for the complex number table will be used, resulting in "-3-24i" again.

share|improve this answer

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges

add a comment | 

Unlike the Lua print function, which implicitly applies tostringto its argument, tex.sprint is defined to print each entry of a table separately if its argument is a table. The complex number is a two item table with the real and imaginary part with a custom tostring function that adds the i.

So print(matrix.det(cmatrix(m))) invokes tostring and prints -3-24i but tex.sprint applies the normal numeric tostring to each element of the table separately so prints -3 then -24. If you explicitly apply tostring before calling tex.sprint then the function specified for the complex number table will be used, resulting in "-3-24i" again.

share|improve this answer

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges

share|improve this answer

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges

answered Jul 24 at 16:30

David CarlisleDavid Carlisle

518k4444 gold badges11731173 silver badges19431943 bronze badges