amacrine {spatstat} | R Documentation |
Austin Hughes' data: a point pattern of displaced amacrine cells in the retina of a rabbit. A marked point pattern.
data(amacrine)
An object of class "ppp"
representing the point pattern of cell locations.
Entries include
x | Cartesian x-coordinate of cell |
y | Cartesian y-coordinate of cell |
marks | factor with levels off and on |
indicating ``off'' and ``on'' cells |
See 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 rectangle with dimensions 1.6065 by 1.0 where the unit of measurement is approximately 1 mm.
The data were analysed by Diggle (1986).
Peter Diggle, personal communication
Diggle, P. J. (1986). Displaced amacrine cells in the retina of a rabbit: analysis of a bivariate spatial point pattern. J. Neurosci. Meth. 18, 115125.