Thanks for this solution. Sounds small and clean. I need to learn Lua I guess.
On Tue, Dec 15, 2009 at 5:34 AM, Aditya Mahajan <adit...@umich.edu> wrote: > On Sat, 28 Nov 2009, 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 ? >> >> Thanks. > > If you are using mkiv, you can use lua to truncate a number. > > \unexpanded\def\truncate#1{\ctxlua{context("\%.1f", #1)}} > > \startMPdefinitions > def truncatedtext(expr s) = > textext("\truncate{" & s & "}") > enddef ; > \stopMPdefinitions > > \starttext > \startuseMPgraphic{Figure} > u := 1cm; > pickup pencircle scaled 2pt; % default pen thickness > %TheFunction > vardef f(expr x) = > (10/x)-x*((0.5)**x) > enddef; > %Labels > %label.lft(textext("\truncate{" & decimal f(5) & "}"),(0,f(5)) scaled u); > label.lft(truncatedtext(decimal f(5)),(0,f(5)) scaled u); > \stopuseMPgraphic > \useMPgraphic{Figure} > > > \stoptext > > Aditya > ___________________________________________________________________________________ > 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 ___________________________________________________________________________________