Thanks so much, Taco. I will try out the code below. Good to know that Metapost has functions such as substring.
On Sun, Nov 29, 2009 at 3:32 AM, Taco Hoekwater <t...@elvenkind.com> wrote: > Curiouslearn wrote: >> >> Hi, >> >> Is it possible to truncate the digits after decimal point in Metapost >> when using textext()? Please see the minimal example below which >> produces 1.84375. Can I just keep the first digit and have it produce >> 1.8 ? > > Here is a helper macro for you: > > def trunc_digits(expr n, origs) = > hide( > string s, tmp; > numeric ii, e; > e := -1; > for i=1 upto length(origs): > ii := i; > tmp := substring (i-1,i) of origs; > if tmp = ".": if n=0: ii:=ii-1; exitif true; fi e:=0; fi > if e>=0: e := e+1; exitif e>n; fi > endfor; > s:=substring(0,ii) of origs; ) > s > enddef; > > > When run this macro with the result of decimal() as second argument, > it will create a new string as many fractional digits as you specify > in the first argument: > > label.lft(textext(trunc_digits(1,decimal f(5))),(0,f(5)) scaled u); > > Best wishes, > Taco > ___________________________________________________________________________________ > 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 > ___________________________________________________________________________________ > ___________________________________________________________________________________ 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 ___________________________________________________________________________________
