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
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
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