On Sun, 20 Jan 2008 10:58:10 +0000, Martin Rich
wrote:

On Thu, 17 Jan 2008 17:05:52 -0000, "Paul Scott"
wrote:


"Tom Anderson" wrote in message
rth.li...


They could break it down by zone, and have separate bar-charts for each.
Or how about some kind of crazy pie-chart, like a dartboard, with each
sector allocated to a line, in roughly the order they head out of London,
each ring corresponding to a zone, and then the height of a 3D tower
rising from each block corresponding to the price?

tom

PS what do you call the subdivision of a circle that's the part of a
sector between two concentric circles? I'm calling it a block because of
hard disks, but it must have a proper name.

Is it an annular sector?

Paul S


I thought annulus but I could be wrong

An annulus is a complete ring between two concentric circles.
http://en.wikipedia.org/wiki/Annulus_%28mathematics%29