OpenMx Help
jkarch
Joined: 03/15/2011
Performance issues many algebras
Hey,
I am currently implementing a new model specification language for longitudinal panel models. As "backend", I use OpenMx. Everything works but it is painfully slow.
- Read more about Performance issues many algebras
- 21 comments
- Log in or register to post comments
paulT
Joined: 11/03/2017
Empirical Underidentification with a bifactor type model
First post by new user: Can anyone give some advice on an empirical under-identification issue please? I am trying to fit the following model:
resVars <- mxPath( from=mylabels, arrows=2,
free=TRUE, values=rep(1,12),
labelatVars <- mxPath( from=c("X1","X2"), arrows=2, connect="unique.pairs",
free=c(TRUE,FALSE,TRUE), values=c(1,0,1), labels=c("varX1","cov","varX2") )
PaulTwin
Joined: 01/29/2017
Error in svd(X) : infinite or missing values in 'x'
Dear OpenMx-ers,
For my research, I am running a latent variable model with an interaction effect between two latent variables on a latent outcome variable, all measured by ordinal and skewed manifest variables. I use WLS estimation and the matched pairs approach (Marsh et al., 2004) to model the latent interaction. I attached two simulated datasets:
* forumdata1: the true size of the latent interaction is 0
* forumdata2: the true size of the latent interaction effect is .04
PaulTwin
Joined: 01/29/2017
Error in t(jac0C) %*% W
Dear OpenMx-ers,
- Read more about Error in t(jac0C) %*% W
- 3 comments
- Log in or register to post comments
lior abramson
Joined: 07/21/2017
Ordinal covariance is not positive definite in data
Hi,
I would like to ask for help with an error:
Details about my openMX run:
OpenMx version: 2.7.12 [GIT v2.7.12-dirty]
R version: R version 3.4.1 (2017-06-30)
Platform: x86_64-w64-mingw32
Default optimiser: CSOLNP
I am trying to run a univariate model with three covariates-one categorical and two continuous. Unfortunately, when I get to the phase of model running (mxRun), no matter what I do, I receive the following error:
lior abramson
Joined: 07/21/2017
error code 6 in Univariate ACE model- Could it be related to missing data?
Hello,
I would like to ask for help with an error code 6:
Required details about my openMX run:
OpenMx version: 2.7.12 [GIT v2.7.12-dirty]
R version: R version 3.4.1 (2017-06-30)
Platform: x86_64-w64-mingw32
Default optimiser: CSOLNP
cjcook
Joined: 05/22/2017
LISREL Simulation
Hello,
I am trying to simulate data using the endogenous variables only LISREL model as seen on page 133 of the OpenMx.pdf help documentation. I was able to simulate data from a state space model using the example in the help documentation on page 174. Now I am modifying that piece of code for a LISREL model. However I am running into an error. Below is my code.
- Read more about LISREL Simulation
- 4 comments
- Log in or register to post comments
Soyoung
Joined: 05/08/2017
multilevel path/structural equation models in OpenMx
Hi,
Is it possible to estimate multilevel path/structural equation models with OpenMx?
If it is possible, is there an example code for multilevel mediation (path) model?
Attached files are the example of multilevel path model using Mplus.
Source: Heck, R. H., & Thomas, S. L. (2015). An introduction to multilevel modeling techniques: MLM and SEM approaches using Mplus. Routledge.
Hope I can do the same analysis using OpenMx.
Thank you in advance.
Soyoung.
Shesprich
Joined: 04/13/2017
OpenMx Installation on Redhat Cluster
Greeting all,
I am attempting to install OpenMx on a x86_64 Redhat Linux cluster running R 3.3.1. I am installing it using the command source('http://openmx.psyc.virginia.edu/getOpenMx.R').
Based on the errors I am getting it looks as if R is not invoking a compiler. Here is the full output of what I am getting:
> source('http://openmx.psyc.virginia.edu/getOpenMx.R')
You are now installing the latest version of OpenMx.--- Please select a CRAN mirror for use in this session ---
HTTPS CRAN mirror
- Read more about OpenMx Installation on Redhat Cluster
- 18 comments
- Log in or register to post comments
Anne H
Joined: 03/30/2017
Problems with requiring OpenMx on Mac OS Sierra 10.12.3
Hi!
I'm having problems with requiring OpenMx. The installation process itself seems to go smoothly. I am running Mac OS Sierra 10.12.3 (macbook pro 15, mid 2015), R 3.3.3 and OpenMx 2.7.9.
I have tried loading OpenMx from cran/ package installer, but then OpenMx doesn’t seem able to run my script, due to missing NPSOL optimizer, as far as I’m able to understand from the error code. Any help regarding what I'm missing here, would be much appreciated :)