Austin Hughes' data: a point pattern of displaced amacrine cells in the retina of a rabbit. A marked point pattern.
An object of class
representing the point pattern of cell locations.
||Cartesian \(x\)-coordinate of cell|
||Cartesian \(y\)-coordinate of cell|
|| factor with levels
ppp.object for details of the format.
Austin Hughes' data: a point pattern of displaced amacrine cells in the retina of a rabbit. 152 ``on'' cells and 142 ``off'' cells in a rectangular sampling frame.
The true dimensions of the rectangle are 1060 by 662 microns. The coordinates here are scaled to a rectangle of height 1 and width \(1060/662 = 1.601\) so the unit of measurement is approximately 662 microns.
The data were analysed by Diggle (1986).
Diggle, P. J. (1986). Displaced amacrine cells in the retina of a rabbit: analysis of a bivariate spatial point pattern. J. Neurosci. Meth. 18, 115--125.