[R] draw a circle with a gradient fill

[Berry, Charles]

> On Oct 24, 2017, at 2:56 AM, Alaios via R-help <r-help at r-project.org> wrote:
> 
> Hi all,I would like to draw a simple circle where the color gradient follows the rule color = 1/(r^2) where r is the distance from the circle.

This is called a radial gradient fill in SVG speak.

[snip]

> but this package does not give easily color gradients and so my solutions contains 5 same colors filled rings.


I would look at the gridSVG package. Examples of various gradient fills are here: 

https://www.stat.auckland.ac.nz/~paul/Reports/leaf/leaf.html#idp625472

HTH,

Chuck