Displaying 20 results from an estimated 500 matches similar to: "confirmatory factor analysis in R"
2011 Mar 18
5
confirmatory factor analysis program in R
Does someone have confirmatory factor analysis program in R,which includes
factor loading and some tests?thank you!
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2013 Mar 10
4
Confirmatory Factor Analysis
Hi,
I'm trying to perform a hierachical, second order CFA.
That's the thing that I need to leave AMOS.
I found some sim.hierarchical and omega stuff, but nothing clear enough.
Can anyone help me?
I just need a simple and clear manual.
Best,
Pablo.
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2011 Mar 27
2
Structural equation modeling in R(lavaan,sem)
I am a new user of the function sem in package sem and lavaan for structural
equation modeling
1. I don?t know what is the difference between this function and CFA
function, I know that cfa for confirmatory analysis but I don?t know what
is the difference between confirmatory analysis and structural equation
modeling in the package lavaan.
2. I have data that I want to analyse but I have some
2004 Jan 29
1
Confirmatory Factor Analysis in R? SEM?
Hi
Has anyone used R to conduct confirmatory factor analysis? This email pertains to use of SEM.
For context consider an example: the basic idea is that there are a bunch of observables variables (say study habbits, amount of time reading in the bus, doing homework, helping other do homework, doing follow-up on errors etc.) and one believes that all these variables maybe measured by two or
2005 Mar 23
1
Confirmatory Factor Analysis in Non-Normal case
Hi:
I am doing a confirmatory factor analysis now. In
the analysis, I have null hypothesis test which
specify some special structure for the loading matrix.
And the alternative is there is no such special
structure. Then the log likelihood ratio test can be
used. The problem I have is my data comes from a
questionnaire and all the variables are discrete from
1 to 7, which makes the normality
2009 May 22
1
Confirmatory factor analysis problems using sem package (works in Amos)
Hello all,
I'm trying to replicate a confirmatory factor analysis done in Amos. The
idea is to compare a one-factor and a two-factor model. I get the following
warning message when I run either model:
"Could not compute QR decomposition of Hessian.
Optimization probably did not converge."
I have no idea what to do here. I believe posters reported the same
problem. It seems
2011 Dec 01
3
FIML with missing data in sem package
Is there a way to use full information maximum likelihood (FIML) to
estimate missing data in the sem package? For example, suppose I have a
dataset with complete information on X1-X3, but missing data (MAR) on X4.
Is there a way to use FIML in this case? I know lavaan and openmx allow you
to do it, but I couldn't find anything in the documentation for the sem
package. Thanks!
--
Dustin Fife
2011 Jun 01
3
error in model specification for cfa with lavaan-package
Dear R-List,
(I am not sure whether this list is the right place for my question...)
I have a dataframe df.cfa
2008 Sep 18
2
Difficulty understanding sem errors / failed confirmatory factor analysis
Hello,
I'm trying to fit a pretty simple confirmatory factor analysis using
the sem package. There's a CFA example in the examples, which is helpful,
but the output for my (failing) model is hard to understand. I'd be
interested in any other ways to do a CFA in R, if this proves troublesome.
The CFA is replicating a 5 uncorrelated-factor structure (for those
interested, it is a
2010 Sep 06
3
path analysis
Hi.
which package i need to install to be able to run "Path analysis" using r?
many thanks, Guy
--
Guy Rotem
Department of Life Sciences
The Spatial Ecology Lab
Ben Gurion University of the Negev
P.O.B. 653 Beer-Sheva 84105
ISRAEL
+972-52-3354485 (mobile)
+972-8-6461350 (lab)
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2012 Aug 10
1
Lavaan: Immediate non-positive definite matrix
Hi,
I recently tried to estimate a linear unconditional latent growth curve on
7 repeated measures using lavaan (most recent version):
modspec='
alpha =~ 1*read_g0 + 1*read_g1 + 1*read_g2 + 1*read_g3 + 1*read_g4 +
1*read_g5 + 1*read_g6
beta =~ 0*read_g0 + 1*read_g1 + 2*read_g2 + 3*read_g3 + 4*read_g4 +
5*read_g5 + 6*read_g6
'
gmod=lavaan(modspec, data=math, meanstructure=T,
2012 Jul 12
1
easy way to fit saturated model in sem package?
Hi,
I am wondering if anyone knows of an easy way to fit a saturated model
using the sem package on raw data? Say the data were:
mtcars[, c("mpg", "hp", "wt")]
The model would estimate the three means (intercepts) of c("mpg",
"hp", "wt"). The variances of c("mpg", "hp", "wt"). The covariance
of mpg with
2012 Nov 01
2
SEM validation: Cross-Validation vs. Bootstrapping
Hello All,
Recently, I was asked to help out with an SEM cross-validation analysis. Initially, the project was based on "sample-splitting" where half of cases were randomly assigned to a training sample and half to a testing sample. Attempts to replicate a model developed in the training sample using the testing sample were not entirely successful. A number of parameter estimates were
2004 Jul 13
5
Help with factanal and missing values
Hi list,
I'm performing a series of confirmatory factor analysis on different
groupings of items from data collected with questionnaires. There are some
missing values.
For those sets with no missing values I call
factanal(datamatrix,factors=n)
where datamatrix is a table of all observations for the items under
investigation.
This call fails when there are missing values.
help(factanal)
[R-pkgs] New package: `lavaan' for latent variable analysis (including structural equation modeling)
2010 May 24
2
[R-pkgs] New package: `lavaan' for latent variable analysis (including structural equation modeling)
Hi Yves
lavaan looks like a very nice package. From the tutorial introduction
I see you create path diagrams for some of the models you describe.
How did you do this? I don't see a function for this in the package.
I know there is a path.diagram function in the sem package that uses
dot to draw the diagram, but I've always found the layouts from dot
somewhat strange for path diagrams
2010 Nov 23
1
Factor analysis and cfa with asymptotically distributed data
I have friendship data which is strong skewed. So it doesn't make sense to
use maximum likelihood methods for fa and cfa.
But I couldn't find any function for asymptotically distributed data for doing a factor analysis. Only: apca() but there is no possibility to allow for factor correlations.
The same problem is with sem() I couldn't get any solutions for my model because of the
2013 Feb 13
1
MIMIC latent variable with PLS Path Modelling with R ?
I want estimate MIMIC latent variable with R in a Monte Carlo simulation.
The packages plspm and semPLS don't permit to introduce MIMIC variable
but only reflexives or formatives variables.
The only one program which permits to use MIMIC latent variable with
PLSPM seems to be XLSTAT, which can not be used to simulate a lot of
data bases.
It is a real challenge to develop a package with
2010 Mar 03
1
(PR#14226) -- Re: libgfortran misplaced in Mac OS X R install (PR#14226)
I am the guy who compiles the OpenMx binaries. We would be delighted
to place our package on CRAN, once the project is stable enough so
that we are comfortable releasing it to the larger public. Let's try
to track down where I made a mistake. Our Makevars.in file contains
the line:
PKG_LIBS=$(FLIBS) $(BLAS_LIBS) $(LAPACK_LIBS)
In addition, on the build machine I noticed that a copy of
2010 Mar 02
1
libgfortran misplaced in Mac OS X R install (PR#14226)
Full_Name: Timothy Brick
Version: 2.10
OS: Mac OS X (seen on both 10.6 and 10.5)
Submission from: (NULL) (63.255.24.5)
When using install.packages in R on Mac OS X, packages that require gfortran
throws an error (Example below from installation of OpenMx package):
Loading required package: OpenMx
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared library
2003 Apr 15
1
R capabilities: Bayesian estimation, Covariance Structure Analysis
I'm contemplating doing Bayesian estimation in R but am wondering how
Bayesian estimation on R stacks up against BUGS. Is R reasonably complete,
more difficult to use,...? Anyone care to share their experience?
Also, am I right to conclude that covariance structure analysis &
confirmatory factor analysis are not available in R? (I can't find them
with help)
Peter