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 ___________________________________________________________________________________ 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 ___________________________________________________________________________________