shapes (version 1.2.7)

mice: T2 mouse vertabrae data

Description

T2 mouse vertebrae data - 6 landmarks in 2 dimensions, in 3 groups (30 Control, 23 Large, 23 Small mice). The 6 landmarks are obtained using a semi-automatic method at points of high curvature. This particular strain of mice is the `QE' strain. In addition pseudo-landmarks are given around each outlines.

Usage

data(mice)

Format

mice$x : An array of dimension 6 x 2 x 76 of the two dimensional co-ordinates of 6 landmarks for each of the 76 mice.

mice$group : Group labels. "c" Control, "l" Large, "s" Small mice

mice$outlines : An array of dimension 60 x 2 x 76 containing the 6 landmarks and 54 pseudo-landmarks, with 9 pseudo-landmarks approximately equally spaced between each pair of landmarks.

References

Mardia, K. V. and Dryden, I. L. (1989). The statistical analysis of shape data. Biometrika, 76, 271-281.

Data from Paul O'Higgins (Hull-York Medical School) and David Johnson (Leeds)

Examples

data(mice)
plotshapes(mice$x,symbol=as.character(mice$group),joinline=c(1,6,2:5,1))