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# This is a demo of H2O's PCA function
# It imports a data set, parses it, and prints a summary
# Then, it runs PCA on a subset of the features
# Note: This demo runs H2O on localhost:54321
library(h2o)
h2o.init()
australia.hex = h2o.uploadFile(system.file("extdata", "australia.csv", package="h2o"), "australia.hex")
summary(australia.hex)
australia.pca = h2o.prcomp(australia.hex, k = 8)
print("Eigenvectors of the PCA model...")
print(australia.pca@model$eigenvectors)
screeplot(australia.pca)
print("Eigenvectors of the PCA model...")
australia.pca2 = h2o.prcomp(australia.hex, k = 4, transform = "STANDARDIZE")
print(australia.pca2@model$eigenvectors)
screeplot(australia.pca2)
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