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Jolliffe I. Principal Component Analysis (2ed., Springer, 2002)(518s)

Jolliffe I. Principal Component Analysis (2ed., Springer, 2002)(518s)

Jolliffe I. Principal Component Analysis (2ed., Springer, 2002)(518s)

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474 Index289, 290, 291SCoTLASS (simplified componenttechnique - LASSO)280–283, 287–291scree graph 115–118, 125, 126,130–132, 134, 135selection of subsets of PCsin discriminant analysis 201,202, 204–206in latent root regression 180, 181in PC regression 168, 170–177,196–198, 202, 205, 245see also how many PCs, rulesfor selecting PCsselection of variablesin non-regression contexts 13,27, 38, 111, 137–149, 186,188, 191, 198, 220, 221, 260,270, 286, 288, 290, 293–295,376stepwise selection/backwardelimination algorithms 142,144, 145, 147see also principal variables,regression analysis (variableselection)self-consistency 20, 378, 379sensible PCA 60sensitivity matrix 240sensitivity of PCs 232, 252,259–263, 278shape and size PCs, see size andshape PCsShapiro-Wilk test 402shrinkage methods 167, 178–181,264, 288signal detection 130, 304, 332signal processing 303, 317, 395signal to noise ratio 337, 388, 401SIMCA 207–208, 239similarity measuresbetween configurations 38between observations 79, 89,106, 210-212, 339, 390between variables 89, 213, 391see also distance/dissimilaritymeasuressimple components 280–287, 291simplicity/simplification 269–271,274, 277–286, 403, 405simplified PC coefficients 66, 67,76, 77see also approximations to PCs,discrete PC coefficients,rounded PC coefficientssimultaneous components 361singular spectrum analysis (SSA)302–308, 310, 316singular value decomposition(SVD) 7, 29, 44–46, 52, 59,101, 104, 108, 113, 120, 121,129, 172, 173, 226, 229, 230,253, 260, 266, 273, 353, 365,366, 382, 383comparison of SVDs 362computation based on SVD 46,173, 412, 413generalized SVD 46, 342, 383,385, 386multitaper frequency domainSVD (MTM-SVD) 302, 311,314, 316size and shape PCs 53, 57, 64, 67,68, 81, 104, 297, 298, 338,343–346, 355, 356, 388, 393,401see also contrasts betweenvariables, interpretationof PCs, patternedcorrelation/covariancematricesskewness 219, 372smoothing and interpolation 274,316, 318, 320, 322, 324–326,334, 335, 377–379of spatial data 334, 335, 364, 365lo(w)ess 326splines 320, 322, 331, 377, 378,387sparse data 331

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