Table 3 Principal component analysis results: rotated component loadings and variance explained.

From: Characterization and source apportionment of heavy metal contamination in agricultural soils in the complex genesis region of western Yunnan

Components

Initial eigenvalues

Extracted load sum of squares

Rotated sum of squared loadings

Total

%Var

%Cum

Total

%Var

%Cum

Total

%Var

%Cum

F1

3.59

44.78

44.78

3.58

44.78

44.78

2.68

33.55

33.55

F2

1.97

24.53

69.31

1.96

24.53

69.31

1.99

24.87

58.43

F3

0.90

11.22

80.53

0.90

11.22

80.53

1.77

22.10

80.53

F4

0.75

9.39

89.91

      

F5

0.35

4.43

94.34

      

F6

0.22

2.76

97.09

      

F7

0.14

1.78

98.87

      

F8

0.09

1.13

100.00

      
  1. Note: “Initial eigenvalues” indicate the variance explained by each principal component prior to rotation. “Extracted load sum of squares” refers to the variance explained by the extracted components before rotation. “Rotated sum of squared loadings” eflects the redistributed variance contributions after Varimax rotation. %Var denotes percentage of variance explained by each component; %Cum represents cumulative explained variance. Only components with eigenvalues > 1 were retained, based on the Kaiser criterion.
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