amacrine: Hughes' Amacrine Cell Data
Description
Austin Hughes' data: a point pattern
of displaced amacrine cells in the retina of a rabbit.
A marked point pattern.format
An object of class "ppp"
representing the point pattern of cell locations.
Entries include
ll{
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.source
Peter Diggle, personal communicationNotes
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).
References
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.