[R] Extracting Factor Pattern Matrix Similar to Proc Factor

[David L Carlson]

Function principal() in psych takes a correlation matrix so use cov2cor() to convert:

library(psych)
iris.pca <- principal(cov2cor(cov(iris[,-5])), nfactors=4, rotate="none")
print(iris.pca$Structure, cutoff=0)

David
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Scott Colwell
Sent: Monday, February 23, 2015 3:34 PM
To: r-help at r-project.org
Subject: Re: [R] Extracting Factor Pattern Matrix Similar to Proc Factor

Thanks David. What do you do when the input is a covariance matrix rather
than a dataset?



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