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%D \module
%D [ file=m-graph,
%D version=2008.09.08,
%D title=\CONTEXT\ Extra Modules,
%D subtitle=\METAPOST\ graph module support,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
% We just assume lua specification instead of the graph ones that
% are limited by what mp can do. We support @ as replacement for
% the percent symbol. We also add a specifier when no one is given.
\unprotect
\startluacode
local format, gsub, find, match = string.format, string.gsub, string.find, string.match
local simplify = true
local function strip(n,e)
-- get rid of e(0)
-- get rid of e(+*)
e = gsub(e,"^+","")
-- remove leading zeros
e = gsub(e,"^([+-]*)0+(%d)","%1%2")
if not simplify then
-- take it as it is
elseif n == "1" then
return format("10^{%s}",e)
end
return format("%s\\times10^{%s}",n,e)
end
function metapost.format_n(fmt,str)
fmt = gsub(fmt,"@","%%")
local initial, hasformat, final = match(fmt,"^(.-)(%%.-[%a])(.-)$")
if hasformat then
str = format(fmt,str)
str = gsub(str,"(.-)e(.-)$",strip)
str = format("%s\\mathematics{%s}%s",initial,str,final)
elseif not find(fmt,"%%") then
str = format("%"..fmt,str)
str = gsub(str,"(.-)e(.-)$",strip)
str = format("\\mathematics{%s}",str)
end
context(str)
end
\stopluacode
\unexpanded\def\MPgraphformat#1#2{\ctxlua{metapost.format_n("#1","#2")}}
% We could also delegate parsing using lower level plugins.
\defineMPinstance
[graph]
[\s!format=metafun,
\s!extensions=\v!yes,
\s!initializations=\v!yes,
\c!method=\s!double]
\startMPdefinitions{graph}
if unknown context_grap: input "mp-grap.mpiv" ; fi ;
\stopMPdefinitions
% For backwards compatibility (for the moment), also load the graph macros in
% the standard MP instance (scaled integer):
\startMPdefinitions
if unknown context_grap: input "mp-grap.mpiv" ; fi ;
\stopMPdefinitions
\protect
\continueifinputfile{m-graph.mkiv}
\starttext
\startMPpage[instance=graph]
label(format("@g","1e-8"), (0, 0)) ;
label(format("@g","1e+8"), (2cm, 0)) ;
label(format("@g","1e-10"), (0, -0.5cm)) ;
label(format("@g","1e+10"), (2cm,-0.5cm)) ;
label(format("@g","1e-12"), (0, -1.0cm)) ;
label(format("@g","1e+12"), (2cm,-1.0cm)) ;
label(format("@g","1e-0"), (0, -1.5cm)) ;
label(format("@g","1e+0"), (2cm,-1.5cm)) ;
label(format("@g","1"), (0, -2.0cm)) ;
label(format("@g","1"), (2cm,-2.0cm)) ;
label(format("@g","1e-102"),(0, -2.5cm)) ;
label(format("@g","1e+102"),(2cm,-2.5cm)) ;
\stopMPpage
% \startMPpage[instance=graph]
% draw begingraph(3in,2in);
% gdraw "t:/metapost/grphdata/agepop91.d";
% endgraph;
% \stopMPpage
% \startMPpage[instance=graph]
% draw begingraph(3in,2in);
% gdraw "agepop91.d" plot btex $\bullet$ etex;
% endgraph;
% \stopMPpage
% \startMPpage[instance=graph]
% draw begingraph(3in,2in);
% glabel.lft(btex \vbox{\hbox{Population} \hbox{in millions}} etex, OUT);
% glabel.bot(btex Age in years etex, OUT);
% gdraw "agepopm.d";
% endgraph;
% \stopMPpage
% \startMPpage[instance=graph]
% draw begingraph(3in,2in);
% glabel.lft(btex \vbox{\hbox{Population} \hbox{in millions}} etex, OUT);
% glabel.bot(btex Age in years etex, OUT);
% setrange(origin, whatever,whatever);
% gdraw "agepopm.d";
% endgraph;
% \stopMPpage
% \startMPpage[instance=graph]
% draw begingraph(2.3in,2in);
% setcoords(log,log);
% glabel.lft(btex Seconds etex,OUT);
% glabel.bot(btex Matrix size etex,
% OUT);
% gdraw "matmul.d" dashed evenly;
% glabel.ulft(btex Standard etex,8);
% gdraw "matmul.d";
% glabel.lrt(btex Strassen etex,7);
% endgraph;
% \stopMPpage
% \startMPpage[instance=graph]
% draw begingraph(6.5cm,4.5cm);
% setrange(80,0, 90,whatever);
% glabel.bot(btex Year etex, OUT);
% glabel.lft(btex \vbox{\hbox{Emissions in} \hbox{thousands of}
% \hbox{metric tons} \hbox{(heavy line)}}etex, OUT);
% gdraw "lead.d" withpen pencircle scaled 1.5pt;
% autogrid(,otick.lft);
% setcoords(linear,linear);
% setrange(80,0, 90,whatever);
% glabel.rt(btex \vbox{\hbox{Micrograms} \hbox{per cubic}
% \hbox{meter of air} \hbox{(thin line)}}etex, OUT);
% gdraw "lead.d";
% autogrid(otick.bot,otick.rt);
% endgraph;
% \stopMPpage
\stoptext
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