Dimensionality Reduction

dimensionality reduction
    meaningful compression
    big data visualization
    structure discovery
    feature elicitation

PCA

• about pca

• rotation

• eig Decomposition

• full pca

• out of sample extension

• svd

pca labs

• pca gene demo

• PCA Faces

• PCA BrestCancer

non linear PCA

• nonLinear PCA

• nonLinear PCA

• kernel PCA

• demo lab pca with k-pca

mds

pca is not a good choice to reduce dimension because it wont know about the data - but it could be used a denoising technique (“denosier”) ; or to reduce the computation time.

• mds

• mds lab “s” shape