# Create a data frame with multiple observations
centralities <- data.frame(
Betweenness = c(0.2, 0.3, 0.5),
Closeness = c(0.4, 0.2, 0.6),
Degree = c(0.3, 0.1, 0.4),
Eigenvector = c(0.1, 0.5, 0.2)
)
pca_centralities(centralities)
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