Contribution of the 342 features to the eight principal components. Each column corresponds to a principal component, and each row corresponds to an original feature dimension. All feature categories make substantial contributions to one or more principal components, suggesting that these categories of information, though correlated, are complementary to a certain extent for predicting the CpG island methylation.
Zheng et al. BMC Medical Genomics 2013 6(Suppl 1):S13 doi:10.1186/1755-8794-6-S1-S13