Displaying 6 results from an estimated 6 matches for "oblimin".
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2011 Jan 26
1
Factor rotation (e.g., oblimin, varimax) and PCA
A bit of a newbee to R and factor rotation I am trying to understand
factor rotations and their implementation in R, particularly the
GPArotation library.
I have tried to reproduce some of the examples that I have found, e.g., I
have taken the values from Jacksons example in "Oblimin Rotation",
Encyclopedia of Biostatistics
http://onlinelibrary.wiley.com/doi/10.1002/0470011815.b2a13060/abstract
and run it through R:
library(GPArotation)
data <- matrix(c(0.6, 0.39, 0.77, 0.70, 0.64, 0.35, 0.52, 0.72, 0.34,
0.58, 0.15, 0.07, -0.13, -0.23, -0.23, 0.67, -0.27, -0.23, 0.7...
2009 Aug 25
3
adding factor scores back to an incomplete dataset...
...simple way to do the following, but i haven't been
able to find it. I am hoping a merciful soul on R-help could point me in
the right direction.
I am doing a factor analysis on survey data with missing values. to do
this, I run:
FA1<-factanal(na.omit(DATA), factors = X, rotation = 'oblimin', scores =
'regression')
Now that I have my factors and factor scores, I want to add those scores
back to my original dataset so I can plot factor scores by demographics.
However, when I try to add the scores back to the original data frame,
the variables are of different lengths....
2005 Apr 27
0
GPArotation package
...radient
Projection Algorithms and Software for Arbitrary Rotation Criteria in
Factor Analysis, ", Educational and Psychological Measurement (in
press). Additional details are available on the web site
<http://www.stat.ucla.edu/research/gpa>.
The following rotations are available:
oblimin oblique oblimin family
quartimin oblique
targetT orthogonal target rotation
targetQ oblique target rotation
pstT orthogonal partially specified target rotation
pstQ oblique partially specified target rota...
2005 Apr 27
0
GPArotation package
...radient
Projection Algorithms and Software for Arbitrary Rotation Criteria in
Factor Analysis, ", Educational and Psychological Measurement (in
press). Additional details are available on the web site
<http://www.stat.ucla.edu/research/gpa>.
The following rotations are available:
oblimin oblique oblimin family
quartimin oblique
targetT orthogonal target rotation
targetQ oblique target rotation
pstT orthogonal partially specified target rotation
pstQ oblique partially specified target rota...
2011 Mar 03
2
PCA - scores
I am running a PCA, but would like to rotate my data and limit the
number of factors that are analyzed. I can do this using the
"principal" command from the psych package [principal(my.data,
nfactors=3,rotate="varimax")], but the issue is that this does not
report scores for the Principal Components the way "princomp" does.
My question is:
Can you get an
2011 Aug 08
0
fa (psych) output oblique.scores=TRUE vs. FALSE
Dear R-List,
I have carried out a factor analysis using fa (psych) with nfactors=2,
rotation="oblimin" and fm="pa". Now I have to report both pattern AND
structure matrix. As I have understood R-Documentation, this can be obtained
by setting the "oblique.scores" argument TRUE (structure matrix) or FALSE
(pattern matrix), respectively. However both produced the same loading...