October 2017
Beginner to intermediate
572 pages
26h 1m
English
book
Machine Learning with R Cookbook - Second Edition
by AshishSingh Bhatia, Yu-Wei, Chiu (David Chiu)
Content preview from Machine Learning with R Cookbook - Second Edition
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By default, if you use the plot function on a generated principal component object, you can also retrieve the scree plot. For more details on screeplot, please refer to the following document:
> help(screeplot)
You can also use nfactors to perform parallel analysis and non-graphical solutions to the Cattell scree test:
> install.packages("nFactors")
> library(nFactors)
> ev = eigen(cor(swiss))
> ap = parallel(subject=nrow(swiss),var=ncol(swiss),rep=100,cent=.05)
> nS = nScree(x=ev$values, aparallel=ap$eigen$qevpea)
> plotnScree(nS)
Non-graphical solution to scree test
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