| mice {shapes} | R Documentation |
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$outlines : An array of dimension 60 x 2 x 76 containing the 6 landmarks and 54 pseudo-landmarks, with 9 pseudo-landmarks approximately equally spaced between each pair of landmarks.
Source
Dryden, I.L. and Mardia, K.V. (1998). Statistical Shape Analysis, Wiley, Chichester. p313
References
Mardia, K. V. and Dryden, I. L. (1989). The statistical analysis of shape data. Biometrika, 76, 271-281.
Data from Paul O'Higgins (Hull-York Medical School) and David Johnson (Leeds)
Examples
data(mice)
plotshapes(mice$x,symbol=as.character(mice$group),joinline=c(1,6,2:5,1))