[R] calculate factor scores
David L Carlson
dcarlson at tamu.edu
Mon Nov 9 22:26:07 CET 2015
I think you can use predict.psych() in package psych. Since you analyzed a correlation matrix with fa() it does not have access to the original data.
-------------------------------------
David L Carlson
Department of Anthropology
Texas A&M University
College Station, TX 77840-4352
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of David Studer
Sent: Monday, November 9, 2015 8:42 AM
To: r-help at r-project.org
Subject: [R] calculate factor scores
Hello everybody,
I have a problem regarding factor analysis:
As I am using the hetmat()-function from the polycor-package in order to
calculate different kinds of correlation coefficients automatically* I
cannot obtain
factor scores using fit$scores. The problem is that I am using the
fa()-function
with a correlation table (structural level) instead of raw data.
Can anyone help me in calculating factor scores ex post?
Thank you for any hints!
David
--
Here's the code:
# select variables
df<-data[c("var1", "var2", "var3", "var4", "var5", "var6")]
# compute heterogenous correlation matrix
library(polycor)
hetmat<-hetcor(df)$cor
# factor analysis
library(psych)
fa.parallel(hetmat) # number of factors?
fit<-fa(hetmat, nfactors=4, fm="ml", rotate="varimax") # factor analysis
colnames(fit$loadings)<-c("Factor1","Factor2","Factor3","Factor4")
fit$scores???
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