Calculating the proportion of variation explained
The proportion of variation and the cumulative proportion of variation explained by the leading PCs are widely used to determine the importance of the PCs and to decide the number of components to retain.
Bu egzersiz
Multivariate Probability Distributions in R
kursunun bir parçasıdırEgzersiz talimatları
- Using the
pca.stateobject that contains the PCs of thestate.x77data, calculate the variance explained by each principal component. - Calculate the proportion of variance explained by each principal component.
Uygulamalı interaktif egzersiz
Bu örnek kodu tamamlayarak bu egzersizi bitirin.
# Variance explained by each PC
pca.var <- ___$sdev^2
# Proportion of variance explained by each PC
pca.pvar <- pca.var/sum(___)