tortues {ade4} | R Documentation |
This data set gives a morphological description (4 characters) of 48 turtles.
data(tortues)
a data frame with 48 rows and 4 columns (length (mm), maximum width(mm), height (mm), gender).
Jolicoeur, P. and Mosimann, J. E. (1960) Size and shape variation in the painted turtle. A principal component analysis. Growth, 24, 339–354.
data(tortues) xyz <- as.matrix(tortues[,1:3]) ref <- -svd(xyz)$u[,1] pch0 <- c(1,20)[as.numeric(tortues$sex)] plot(ref, xyz[,1], ylim = c(40,180), pch = pch0) abline(lm(xyz[,1]~ -1 + ref)) points(ref,xyz[,2], pch = pch0) abline(lm(xyz[,2]~ -1 + ref)) points(ref,xyz[,3], pch = pch0) abline(lm(xyz[,3]~ -1 + ref))