bookstein2d {shapes} | R Documentation |
Carries out Bookstein's baseline registration and calculates a mean shape
bookstein2d(A,l1=1,l2=2)
A |
a k x 2 x n real array, or k x n complex matrix, where k is the number of landmarks, n is the number of observations |
l1 |
l1: an integer : l1 is sent to (-1/2,0) in the registration |
l2 |
l2: an integer : l2 is sent to (1/2,0) in the registration |
A list with components:
k |
number of landmarks |
n |
sample size |
mshape |
Bookstein mean shape with baseline l1, l2 |
bshpv |
the k x n x 2 array of Bookstein shape variables, including the baseline |
Ian Dryden
Dryden, I.L. and Mardia, K.V. (1998) Statistical Shape Analysis. Wiley, Chichester. Chapter 2.
Bookstein, F. L. (1986) Size and shape spaces for landmark data in two dimensions (with discussion). Statistical Science, 1:181-242.
data(gorf.dat) data(gorm.dat) bookf<-bookstein2d(gorf.dat) bookm<-bookstein2d(gorm.dat) plotshapes(bookf$mshape,bookm$mshape,joinline=c(1,6,7,8,2,3,4,5,1))