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
>
>
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