sjedrp.d20: Example data set for DRP (dmin 20).

In sje30/sjedrp: Density Recovery Profile for Retinal Mosaics

Example data set for DRP (dmin 20).

Description

Example data sets for checking the DRP code. These data sets have been run on Rodieck's program for comparison.

Usage

data(sjedrp.d20)

Format

Two columns of data; first column is x coordinate; second column is y coordinate.

Author(s)

Stephen Eglen

Source

These data sets are artificial; they were created with the dmin rule.

References

Rodieck RW (1991). The density recovery profile: A method for the analysis of points in the plane applicable to retinal studies. Visual Neuroscience 6: 95-111.

See Also

‘sjedrp’ for the main code, and ‘rodieckach’ for the data to generate the DRP from Rodieck (1992). See sjedrp.d10 for more documentation.

Examples

data(sjedrp.d20)
bb <- c(0, 700, 0, 700)
res <- autodrp(sjedrp.d20$x, sjedrp.d20$y, nbins=20, r=10, a=bb)
plot(res)
stopifnot(abs(0.20 - res$p)< 0.03)
stopifnot(abs(19.3 - res$effrad)< 0.15)

sje30/sjedrp documentation built on May 1, 2024, 5:20 p.m.