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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 / Hans Hagen \& Ton Otten}]
%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.
\startluacode
local function strip(s)
return "\\times10^{"..(s:gsub("%+*0*","")).."}"
end
function metapost.format_n(fmt,str)
fmt = fmt:gsub("@","%%")
local initial, format, final = fmt:match("^(.-)(%%.-[%a])(.-)$")
if format then
str = fmt:format(str)
str = str:gsub("e(.-)$",strip)
str = ("%s\\mathematics{%s}%s"):format(initial,str,final)
elseif not fmt:find("%%") then
str = ("%"..fmt):format(str)
str = str:gsub("e(.-)$",strip)
str = ("\\mathematics{%s}"):format(str)
end
tex.sprint(str)
end
\stopluacode
\unexpanded\long\def\MPgraphformat#1#2{\ctxlua{metapost.format_n("#1","#2")}}
% We could also delegate parsing using lower level plugins.
\startMPinclusions
% input string ;
% input marith ;
input graph.mp ;
vardef roundd(expr x, d) =
if abs d > 4 :
if d > 0 :
x
else :
0
fi
elseif d > 0 :
save i ; i = floor x ;
i + round(Ten_to[d]*(x-i))/Ten_to[d]
else :
round(x/Ten_to[-d])*Ten_to[-d]
fi
enddef ;
Ten_to0 = 1 ;
Ten_to1 = 10 ;
Ten_to2 = 100 ;
Ten_to3 = 1000 ;
Ten_to4 = 10000 ;
def sFe_base =
enddef ;
picture Fe_plus ; Fe_plus := btex + etex ;
vardef format (expr f,x) = dofmt_.Feform_(f,x) enddef ;
vardef Mformat (expr f,x) = dofmt_.Meform (f,x) enddef ;
vardef formatstr (expr f,x) = dofmt_.Feform_(f,x) enddef ;
vardef Mformatstr(expr f,x) = dofmt_.Meform(f,x) enddef ;
vardef escaped_format(expr s) =
"" for n=1 upto length(s) : &
if ASCII substring (n,n+1) of s = 37 :
"@"
else :
substring (n,n+1) of s
fi
endfor
enddef ;
vardef dofmt_@\#(expr f, x) =
textext("\MPgraphformat{" & escaped_format(f) & "}{" & (if string x : x else: decimal x fi) & "}")
enddef ;
% vardef format(expr f, x) =
% textext("\MPgraphformatN{"&escaped_format(f)&"}{"&(if string x : x else: decimal x fi)&"}")
% enddef;
% vardef Mformat(expr f, x) =
% format(f,x)
% enddef;
\stopMPinclusions
\doifnotmode {demo} {\endinput}
\doiffileelse {agepop91.d} {} {\writestatus{graph}{no data files found}\wait\end}
%D The test:
\starttext
% \startMPpage
% draw begingraph(3in,2in);
% gdraw "t:/metapost/grphdata/agepop91.d";
% endgraph;
% \stopMPpage
% \startMPpage
% draw begingraph(3in,2in);
% gdraw "agepop91.d" plot btex $\bullet$ etex;
% endgraph;
% \stopMPpage
% \startMPpage
% 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
% 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
% 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
% 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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