R help - Aug 2006 - bullseye or polar display of "circular" data

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

On Thu, 2006-08-03 at 07:46 -0700, Michael Jerosch-Herold
wrote:
> 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
You might want to take a look at the 'circular' or 'CircStats'
packages
on CRAN:

http://cran.us.r-project.org/src/contrib/Descriptions/circular.html

http://cran.us.r-project.org/src/contrib/Descriptions/CircStats.html

There are some examples of plots generated using the packages in the R
Graphics Gallery here:

http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=121
http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=97


HTH,

Marc Schwartz

Michael Jerosch-Herold wrote:
> 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?
> 
I'm not quite sure that I understand the display you want, but 
radial.plot in the plotrix package might do what you want. Also you 
could check the circular and CircStats packages.

Jim