Thanks Taco! I added this and Hans' explanations to the wiki: https://wiki.contextgarden.net/variable_color
but could not set a better title for that page such as « Variable arrays of colors, pens, paths ». Best regards: Otared > On 22 Jun 2020, at 09:28, Taco Hoekwater <t...@elvenkind.com> wrote: > > > >> On 22 Jun 2020, at 09:17, Otared Kavian <ota...@gmail.com> wrote: >> >> Hi Hans, >> >> After learning from you how to define an array of colors and paths, I would >> like to know how is it possible to define a variable pen size. >> In the following working example below, I would like to replace >> >> MyPens[j] := pencircle scaled 2pt ; >> >> by something like >> >> MyPens[j] := pencircle scaled (2+j) pt ; > > MyPens[j] := pencircle scaled ((2+j)*pt); > > “pt” is just a multiplier variable in MetaPost. there is an > implied multiplication operation, but that only works in > bare-number cases. That is why you need > > (2+j)*pt > > The outer parentheses are to prevent MetaPost from interpreting > your line as > > (pencircle scaled (2+j)) * pt; > > Best wishes, > Taco > > > ___________________________________________________________________________________ > 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://context.aanhet.net > archive : https://bitbucket.org/phg/context-mirror/commits/ > wiki : http://contextgarden.net > ___________________________________________________________________________________ ___________________________________________________________________________________ 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://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________