Ten quick tips for effective dimensionality reduction
Fig 3
PCA on wine dataset shows how variables' representation can be used to understand the meaning of the new dimensions. Correlation circle (a) and PC1 contribution plot (b). AlcAsh, alcalinity of ash; Dim1, dimension 1; Dim2, dimension 2; Flav, flavanoids; NonFlav Phenols, nonflavanoid phenols; OD, OD280/OD315 of diluted wine; PC, principal component; PCA, PC analysis; Phenols, total phenols; Proa, proanthocyanins.