Re: using variable for subscript in math+lua (and math+MetaFun)

Re: using variable for subscript in math+lua (and math+MetaFun)

[Jeong Dal]

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"?

Thank you again.

Best regards,

Dalyoung

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Re: using variable for subscript in math+lua (and math+MetaFun)

[Hans Hagen]

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


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: using variable for subscript in math+lua (and math+MetaFun)

[Jeong Dal]

Dear Hans,

The structure of your code  is very interesting.

((((MP code) inside ConTeXt) inside Lua) inside ConTeXt) again!

It is really useful.

Thank you.

Best regards,

Dalyoung

> 
> 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
> 

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________