[metapost] Graph v New number systems

[Hans Hagen]

On 11/4/2022 9:25 AM, Toby Thurston wrote:
> thanks for that.
> 
> I think I will have a further look at marith.mp then, and see if it could be made compatible with the extended number systems.
> 
> Something like:
> 
> if numbersystem = “scaled”:
>     % do normal marith
> else:
>     % provide versions of all the marith functions that work with new number systems
> fi
you can plug in some lua ...

     vardef MyFormat(expr f, n) =
         string l ;
         l := "return string.char(34) .. string.format(" &
             ditto & (char 37) & f & ditto &  "," & decimal n &
             ") .. string.char(34)";
       % message(l);
         runscript(l)
     enddef ;

     string s[] ;
     s[1] := MyFormat("0.3f",123.456789) ;
     s[2] := MyFormat("0.7f",123.456789);

     message(s[1]);
     message(s[2]);

     % whatever suits:

     draw textext(s[1]) ;
     draw textext(s[2]) shifted (0,-1cm) ;

(not really the context / metafun way but good enough for plain usage)

Hans


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