
480 Data Analysis and Statistics for Geography, Environmental Science, and Engineering
The eigenvectors are
vvv
123
051
054
067
072
015
068
0
=
−
−
−
=
−
=
.
.
.
.
.
.
..
.
.
47
083
031
−
Calculate total variance and discuss its distribution among the eigenvalues. Would you keep all
three components? Or would two sufce? Or would one component sufce? Draw a diagram show-
ing the rst two eigenvectors. Write the matrix of loadings.
Exercise 14.4
Complete the calculations of Q-mode CA to arrive at the scores Z
Q
shown in Equation 14.53.
14.10 COMPUTER SESSION: MULTIVARIATE ANALYSIS, PCA
14.10.1 eiGenvalues anD eiGenvectors of covariance Matrices ...