March 2016
Beginner to intermediate
232 pages
12h 12m
English
Content preview from Exploratory Factor Analysis with SASBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Which Method?
Orthogonal vs Oblique
Orthogonal and oblique rotations will produce virtually
identical solutions in the case where factors are perfectly uncorrelated.
As the correlation between latent variables diverges from r =
0.00, the oblique solution will produce increasingly clearer rotated
factor patterns.
Using the following
syntax, we can try each type of rotation on the engineering data and
output a plot of the rotated factor loadings from the pattern matrix.
We use ODS to plot the results, and request the plots of the factor
loadings by including the
PLOTS = LOADINGS option
on the FACTOR statement.
ods graphics on/ width = 4in height = 6in; proc factor data = engdata nfactors = 2 method = prinit priors = SMC rotate = VARIMAX plots ...
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