R prcomp()

1 개요

R prcomp()

## the variances of the variables in the
## USArrests data vary by orders of magnitude, so scaling is appropriate
#prcomp(USArrests) # inappropriate

prcomp(USArrests, scale = TRUE)
## Standard deviations (1, .., p=4):
## [1] 1.5748783 0.9948694 0.5971291 0.4164494
## 
## Rotation (n x k) = (4 x 4):
##                 PC1        PC2        PC3         PC4
## Murder   -0.5358995  0.4181809 -0.3412327  0.64922780
## Assault  -0.5831836  0.1879856 -0.2681484 -0.74340748
## UrbanPop -0.2781909 -0.8728062 -0.3780158  0.13387773
## Rape     -0.5434321 -0.1673186  0.8177779  0.08902432

2 같이 보기

• R cor()
• R cov()
• R svd()
• R eigen()
• R screeplot()
• R princomp()
• R biplot.prcomp()

3 참고

• https://www.rdocumentation.org/packages/stats/versions/3.6.0/topics/prcomp