[R] bullseye or polar display of "circular" data

[Michael Jerosch-Herold]

I have data for several rings of a left heart chamber, and which I would like to display in concentric rings, with color-encoding of the values. Each ring corresponds to one slice through the heart, and the rings correspond to positions from the base to the apex of the heart as you move from the outermost ring to the innermost one. The data have a circular pattern. These types of displays are referred to as bullseye displays in the nuclear medicine literature. Does any reader of these messages know of a R function/package that offers this functionality?

Also I noticed that in some contexts you can define a "circular" attribute for your data. Are there plot routines for such "circular" data?

thank you!

Michael Jerosch-Herold