amacrine {spatstat}R Documentation

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.

Usage

data(amacrine)

Format

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.

Notes

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).

Source

Peter Diggle, personal communication

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.


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