
485Multivariate Analysis I
14.10.4 pca hiGher-DiMensional exaMple
Let us work with data in le lab14/canopy.csv. The dataset is from Acevedo et al. (2001). It
refers to fragmentation metrics of canopy images of a tropical cloud forest taken at differ-
ent locations along two transects. Each image comes from a photograph of the canopy taken
from the ground. A canopy opening is dened as intensity of color in a pixel of the picture.
Contiguous gaps make up patches of different sizes. First row are variable labels, and rst col-
umn is sampling points ID label.
ID,POC,PRL,LAI,NP,PD,MPS,LPI,MSI,MPFD
1n,2.98,8.02,2.29,1915,7.37,0.14,15.73,1.3,1.55
2n,1.72,8.76,2.94,2207,12.29,0.08,4.23,1.3,1.55 ...