Working with Principal Components
Functions for working efficiently with Principal Components

pcaplot()

Sample PCA plot for transformed data 
pcaplot3d()

Sample PCA plot for transformed data 
pcascree()

Scree plot of the PCA on the samples 
correlatePCs()

Principal components (cor)relation with experimental covariates 
genespca()

Principal components analysis on the genes 
hi_loadings()

Extract genes with highest loadings 
plotPCcorrs()

Plot significance of (cor)relations of covariates VS principal components 