Thank you Alan. That was exactly the redirection needed.
John
On Jul 7, 2013, at 9:24 AM, Alan BRASLAU wrote:
Metapost now has double precision arithmetic, so one no longer needs to
use the string arithmetic macros. However, it may be necessary to use
scantokens as in
clearxy;
z = (scantokens v1, scantokens v2);
augment.p(x,0);
augment.p(x,y);
x := x + 0.4 ;
augment.p(x,y);
augment.p(x,0);
Alan
On Sat, 6 Jul 2013 22:01:06 -0400
John Kitzmiller k...@inradius.net wrote:
When trying to make a bar graph with m-graph.mkiv and sarith, the
command Ssub (string subtract) seems to augment.p(v1 Sadd
0.4,v2);Sadd instead. An mwe of a bar graph:
(data1 is a separate file containing
01 02
02 03)
\usemodule[m-graph]
\startMPpage[instance=graph]
input sarith;
draw begingraph(5cm,5cm);
gdata(data1, v,
path p;
augment.p(v1,0);
augment.p(v1,v2)
augment.p(v1 Sadd 0.4,v2);
augment.p(v1 Sadd 0.4,0);
gfill p--cycle withcolor .8white;
gdraw p--cycle;
);
endgraph;
\stopMPpage
...which gives bars of width 0.4 starting at abscissa 1 and 2 as
expected. To increase the width of the bars to 0.8 and have them
centered over 1 and 2, I expect to Ssub from the first two augments:
\usemodule[m-graph]
\startMPpage[instance=graph]
input sarith;
draw begingraph(5cm,5cm);
gdata(data1, v,
path p;
augment.p(v1 Ssub 0.4,0);
augment.p(v1 Ssub 0.4,v2);
augment.p(v1 Sadd 0.4,v2);
augment.p(v1 Sadd 0.4,0);
gfill p--cycle withcolor .8white;
gdraw p--cycle;
);
endgraph;
\stopMPpage
However, the Ssub adds instead and gives a line at 1.4 and 2.4.
Compiling the above with mpost or mptopdf gives the desired
result(s), but I am curious if this can be resolved so such bar
graphs could be made within ConTeXT/METAFUN.
Thanks! John
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