[GRASS-user] Calculating eigen values and % varianceexplainedafter PCA analysis

[Hamish]

Hamish wrote:
> # 'automatic method'
> imagery60:G6.5svn> i.pca in=spot.ms.1,spot.ms.2,spot.ms.3 out=spot_pca
> 
> Eigen (vectors) and values:
> PC1 ( -0.63 -0.65 -0.43 ) 88.07
> PC2 ( 0.23 0.37 -0.90 ) 11.48
> PC3 ( 0.75 -0.66 -0.08 ) 0.45

changed to:
Eigen values, (vectors), and [percent importance]:
Eigenvalue 1: 1170.12 ( -0.63 -0.65 -0.43 ) [88.07%]
Eigenvalue 2: 152.49 ( 0.23 0.37 -0.90 ) [11.48%]
Eigenvalue 3: 6.01 ( 0.75 -0.66 -0.08 ) [0.45%]

comments welcome.


Hamish