On 25-10-2012 13:59, Jeong Dal wrote:

Dear Gesang and Hans,

Your solution is working nicely. I may use lua to simplify my other work.

I'd like to ask you one more thing.

I tried to write a matrix using MetaFun to add some graphics as following:

label(btex $a_{11}$ etex, ( , )); label(btex $a_{12}$ etex, ( , )); label(btex $a_{13}$ etex, ( , )); … label(btex $a_{3,3}$ etex, ( , ));

Since the same command is repeated, I tested to use "for" iteration. But I couldn't succeed. It is OK to use the variable as a text but I couldn't find a way to use a variable as a subscript.

For example,

for i=1 unto 3: label(btex decimal(i) etex, (x,y)); endfor;

is OK. But,

for i=1 upto 3: label(btex $a_{i}$ etex, (x,y)); endfor; or for i=1 upto 3: label(btex $a_{deciaml(i)}$ etex, (x,y)); endfor;

are not working as I wanted.

Is there a way to use variable as a subscript in "label"?

play with code like this \starttext \startluacode context.startMPcode() for i=1,10 do for j=1,10 do context('draw (%scm,%scm) withpen pencircle scaled 2mm ;',i,j) context('draw thetextext.top("\\tt%s,%s",(%scm,%scm+2mm)) ;',i,j,i,j) end end context.stopMPcode() \stopluacode \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------