Re: [NTG-context] making tables with lua

17 Oct 2012

      Dear Proch?zka Luk?? Ing and Hans,

Thank you for the reply.

It works fine.

I modify your code to write a matrix and it also works too.

\startformula
\startluacode
local NC, NR = context.NC, context.NR
local t = {{1,0,3,4},{0,2,-2,5},{0,0,1,2}}
context.startmatrix() --"{left={\left (\,},right={\,\right)}}")
for _, r in ipairs(t) do
for _, c in ipairs(r) do
NC()
context(c)
end
NR()
end
context.stopmatrix()
\stopluacode
\stopformula

But I couldn't put "( )" before and after matrix.
If I use
context.startmatrix("{left={\left (\,},right={\,\right)}}")
then it wrote "left…" as text before the matrix.

How to enclose matrix with (  )?

Thank you again.

Best regards,

Dalyoung
...
4. Re: making tables with lua
    (Proch?zka Luk?? Ing. - Pontex s. r. o.)
Once you have such functions prepared, you just select to type:
printTabulate(mytab) -- via 'tabulate'
or
printTABLE(mytab) -- via 'TABLE'
If you insist on 'tabulate' family, you could use the following snippet for your start:
----
\starttext
 \startluacode
   local tab = {{1,2},{3,4}}
printTabulate = function(tab)
     context.starttabulate{"|" .. string.rep("c|", #tab[1])}
       context.HL()
       for _, r in ipairs(tab) do
         for _, c in ipairs(r) do
           context.VL()
           context(c)
         end
         context.VL()
         context.NR()
         context.HL()
       end
     context.stoptabulate()
   end
printTabulate(tab)
 \stopluacode
\stoptext
----
You can write a similar function(s) to typeset via 'TABLE'.
Best regards,
Lukas
On Wed, 17 Oct 2012 03:13:39 +0200, Jeong Dal  wrote:
...
Dear all,
I used code which generates the table as following:
\startluacode
local NC, NR, HL, VL = context.NC, context.NR, context.HL, context.VL
context.starttabulate { "|c|c|c|c|c|c|c|c|c|c|" }
HL()
for i=1, 6, 1 do
  for j=1,10 ,1 do
      k= i % 3
      if k==1 then
      	VL() context(10*(i - k)/3+j)
      else
      	VL()
      end
  end
  VL()
  NR()
  if k==0 then
      HL()
  end
end
context.stoptabulate()
\stopluacode
But it has a fixed column definition as "|c|c|c|c|c|c|c|c|c|c|" and the number of columns.
I wonder it is possible to use the variable for "j" to control the number of columns and the column setting.
Of course, I may put similar codes  which are different only in the number of columns and column settings when I need a table.
But I have many similar tables whose number of columns are different only.
If such a method is possible, I'd like to put such a code in \startbuffer?\stopbudffer and call it to generate tables of various number of columns given at each time.
I also don't know whether it is possible to convey a number from ConTeXt to the variable in Lua code.
I write this email because I saw a hope in recent discussion "Re: Fwd: Need help with \definetabulate" which has a method to vary the column setting.
\definetabulate
[whatever]
[|l|r|]
\definetabulate
[whatever][else]
[|l|c|r|]
It may be a lazy man's question with no need for others.
Thank you for reading.
Best regards,
Dalyoung
-- 
Ing. Luk?? Proch?zka [mailto:LPr@pontex.cz]
Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
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