Displaying 17 results from an estimated 17 matches similar to: "import from LISREL output of parameter estimates"
2007 Apr 09
3
sem vs. LISREL: sem fails
I am new to R.
I just tried to recreate in R (using sem package and the identical input data) a solution for a simple measurment model I have found before in LISREL. LISREL had no problems and converged in just 3 iterations.
In sem, I got no solution, just the warning message:
"Could not compute QR decomposition of Hessian.
Optimization probably did not converge.
in: sem.default(ram =
2011 Jul 28
1
Lisrel 8.8 installation
Hello to everybody. My name is Carlo and I would like to share with you a problem I encountered. I've tried to install a statistical software, LISREL V.8.8, usually running under Windows.
I followed all the Wine procedure by the graphical interface, not command line. The installation seemed complete: at the end of it the installation package asked me to reboot my laptop. I did it twice: the
2002 Oct 08
2
sem (lisrel) - starting problems
Hi,
(1.)
How is it possible to get automatic a "lower triangle of correlation matrix" ?
h.cor <- cor(dat,use="pairwise.complete.obs")
zz <- lower.tri(h.cor,diag=T)
### that's not what i wish and "wrong" ?
results <- matrix(unlist(h.cor[upper.tri(h.cor,diag=T)]))
results <- matrix(unlist(h.cor[upper.tri(h.cor,diag=T)]),5)
Must i take the lowest
2006 Aug 22
1
Total (un)standardized effects in SEM?
Hi there,
as a student sociology, I'm starting to learn about SEM. The course I
follow is based on LISREL, but I want to use the SEM-package on R
parallel to it.
Using LISREL, I found it to be very usable to be able to see the
total direct and total indirect effects (standardized and
unstandardized) in the output. Can I create these effects using R? I
know how to calculate them
2011 May 11
3
Vermunt's LEM in R
I don't know of any R package that can match all the functionality of LEM
eg fitting equality constraints to model parameters a la LISREL.
WRT dumping tables, I would have thought that as.data.frame.table does
pretty much what you want, [not tested]
newtab <- as.data.frame(table(a,b,c))
cat("dim\n")
for(i in seq(1, ncol(newtab)-1) {
cat(nlevels(newtab[,1]," ")
}
2009 Jan 06
1
R SEM package
Does anyone know if the sem package in R can implement a stacked model
comparison, for example as in LISREL or AMOS?
Thanks,
Anthony
--
Anthony Steven Dick, Ph.D.
Post-Doctoral Fellow
Human Neuroscience Laboratory
Department of Neurology
The University of Chicago
5841 S. Maryland Ave. MC-2030
Chicago, IL 60637
Phone: (773)-834-7770
Email: adick at uchicago.edu
Web:
2004 Dec 09
1
Re: Tetrachoric and polychoric correlations, Polycor package
A bit late, but you might like to look at
http://www.qimr.edu.au/davidD/polyr.R
Regarding the original posters queries:
You can analyse polychoric correlations as if they were Pearson
correlations using standard software (eg sem), and this usually doesn't do
too badly, or go to AWLS (Browne) in LISREL etc, or ML analysis
of the full multidimensional contingency table using programs such as
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)
2009 Dec 26
5
Is SEM package of R suitable for sem analysis
Dears,
I'm a college student and In doing my statistics homework.
I use R with SEM package as my tool for sem analysis,
but my teacher told me AMOS is more suitable for such analysis.
Could someone help tell me whether it is true
that some commercial software is better accepted in academic fields?
Sorry if I should not post such topics here.
--
Best Regards,
Reeyarn T. Lee
Accounting
2007 Apr 11
1
creating a path diagram in sem
Hello,
I finally run my measurement model in sem - successfully. Now, I am trying to print out the path diagram that is based on the results - but for some reason it's not working. Below is my script - but the problem is probably in my very last line:
# ANALYSIS OF ANXIETY, DEPRESSION, AND FEAR - LISREL P.31
library(sem)
# Creating the ANXIETY, DEPRESSION, AND FEAR intercorrelation matrix
2008 Mar 03
2
Constrained regression
Dear list members,
I am trying to get information on how to fit a linear regression with
constrained parameters. Specifically, I have 8 predictors , their
coeffiecients should all be non-negative and add up to 1. I understand it is
a quadratic programming problem but I have no experience in the subject. I
searched the archives but the results were inconclusive.
Could someone provide suggestions
2002 May 30
2
Systems of equations in glm?
I have a student that I'm encouraging to use R rather than SAS or Stata
and within just 2 weeks he has come up with a question that stumps me.
What does a person do about endogeneity in generalized linear models?
Suppose Y1 and Y2 are 5 category ordinal dependent variables. I see
that MASS has polr for estimation of models like that, as long as they
are independent. But what if the
2002 Mar 26
0
correlation matrix for mixed contin/nominal/ordinal variables
I have a consulting client with data containing a mixture of
continuous, nominal, and ordinal variables, who wishes
to do some correlational analyses.
Ignoring for the moment whether this is wise or useful,
is there some way to calculate a matrix using, for example,
polychoric correlations for pairs of nominal variables,
or correlations based on normal scores for ordinal variables?
[The PRELIS
2002 Oct 15
0
Identification of heterogeneous subpopulation (MECOSA3)
Hi,
i read something about MECOSA3 (G.Arminger)
which is a software to :
"Analysis of finite mixtures of conditional Lisrel models"
I'm very interested to identify heterogeneous subpopulations and ask
me are similar functions doing something in R, too ???
I know SEM and perhaps with some additions/modifications it is possible
doing this general mean- and covariance structures with
2004 Dec 09
0
Re: Polychoric correlations
This is a bit late, but:
> About two years ago there was a thread about this which suggested that at
> that time nobody had these coefficients ready to go.
> (a) has anyone in the meanwhile programmed them?
http://www.qimr.edu.au/davidD/R/polyr.R
> (d) I appreciate this last item is not strictly an R question, but my
> intention is to use these as input into the sem package for
2000 Feb 02
0
Factor Analysis?
Hello.
I have been browsing the R- manual and not seen any direct
implementation of Factor analysis.
Is there anyone out there who has run Factor Analysis with R?
Thanks
Michael
--
Michael Preminger
Forsker / Research Scientist
Avdeling for journalistikk,
bibliotek- og informasjonsfag /
Faculty of Journalism, Library and
Information Science
H?gskolen i Oslo / Oslo College
2012 May 08
6
registry vulnerabilities in R
Kirtland Air Force Base has denied approval for the use of R on its
Windows network. Some of their objections seem a bit strange, but some
appear to be legitimate. In particular, they have detected registry
"vulnerabilities"
which are detailed in the attachment.
I know nothing about Windows registry vulnerabilities. If any of these
issues are
legitimate concerns,