Morpho (version 2.6)

showPC: convert PCs to landmark configuration

Description

convert PC-scores to landmark coordinates

Usage

showPC(scores, PC, mshape)

Arguments

scores

vector of PC-scores, or matrix with rows containing PC-scores

PC

Principal components (eigenvectors of the covariance matrix) associated with 'scores'.

mshape

matrix containing the meanshape's landmarks (used to center the data by the PCA)

Value

returns matrix or array containing landmarks

Details

Rotates and translates PC-scores derived from shape data back into configuration space.

See Also

prcomp, procSym

getPCscores

Examples

# NOT RUN {
if (require(shapes)) {
## generate landmarks using
##the first PC-score of the first specimen

proc <- procSym(gorf.dat)
lm <- showPC(proc$PCscores[1,1],proc$PCs[,1],proc$mshape)
plot(lm,asp=1)

##now the first 3 scores
lm2 <- showPC(proc$PCscores[1,1:3],proc$PCs[,1:3],proc$mshape)
points(lm2,col=2)
}
# }