Re: [NTG-context] How to define an array of pens

On 22 Jun 2020, at 09:17, Otared Kavian 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