OpenSEM Forums
JuanJMV
Joined: 07/20/2016
Multivariate ACE-ADE model
Hello,
I am trying to fit a 5-variate model. But I am not sure about the best way to do it.
I have got these results from the univariate analyses
VAR1
ADE 0.34 0.10 0.57
AE 0.42 * 0.58
VAR2
ADE 0.26 0.16 0.58
AE 0.41 * 0.59
VAR3
ACE 0.29 0.13 0.58
AE 0.45 * 0.55
CE * 0.33 0.67
VAR4
ADE 0.23 0.17 0.59
AE 0.39 * 0.61
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diana
Joined: 04/17/2019
Why mxTryHardOrdinal（）dosen't report start values?
Hi, everyone!
When i useSatFit <- mxTryHardOrdinal(SatModel, intervals=TRUE,extraTries = 15,finetuneGradient=FALSE,bestInitsOutput=TRUE) ,the result is Solution found! Final fit=22505.957 (started at 22819.562) (16 attempt(s): 16 valid, 0 errors). I don't know why it dosen't report start values from the best fit.
diana
Joined: 04/17/2019
saturated univariate SEM model of a binary variable
Dear all,
I have some problems of fitting saturated univariate SEM model of a binary variable "whtr_g". I would appreciate it if anyone could help me.
1. I always get warning message when fitting saturated SEM model(see warning message.png), whether using SLSQP, NPSOL or CSOLNP optimizer. What’ more, the result of three optimizers are different. But I don’t know if there are errors in my code. Please help me to check it.
Julia
Joined: 03/29/2012
Moderation model produces weird results
Hi all,
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yaning
Joined: 04/12/2019
How to calculate bivariate h2(or c2, e2) in bivaraite SEM model with two binary traits?
Hi,
I have encountered several problems in doing bivariate SEM models, which is an important part of my graduation project.The main problems are as follows:
Aivil
Joined: 03/14/2019
Example Scripts for Latent Class Growth Analysis (LCGA)??
Hello,
Are example scripts available for Latent Class Growth Analysis (LCGA) in OpenMx?
Many thanks!
Aivil
Joined: 03/14/2019
How to implement FIML estimation in OpenMx?
Hello,
I am running this code to conduct LGCM prior to GMM.
I was wondering if there is a way of implementing FIML instead of ML in my code.
This is because my data has a lot of missingness by design (longitudinal data) and is not normally distributed.
Many thanks!!!
require(OpenMx)
?MxFitFunction
fitFunction <- mxFitFunctionML(rowDiagnostics=TRUE)
mxOption(NULL,"Default optimizer","SLSQP") ### to avoid msg error: https://openmx.ssri.psu.edu/node/4238
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Aivil
Joined: 03/14/2019
3-class Mixture Model : Help to find Starting Values for each class!!
Hello,
I am currently try to fit a 3-class mixture model on longitudinal data. I'm having a hard time understanding how I should set the starting values for each class.
As far as I understood from Chapter 7 of "Growth Modeling" (Grimm, Ram & Estabrook, 2017), p.150, starting values should be different for each class.
I have tried using the mxTryHard() function to set the best fitting starting values, but it seems there is no difference in the outputs with or without that function.
Aivil
Joined: 03/14/2019
Associative Growth Mixture Model in OpenMx
Hello,
Is it currently possible to implement an Associative Growth Mixture Model in OpenMx? I was having a look at this paper from Hix-Small et al. (2004) where the authors are combining a multivariate LGM and a GMM to simultaneously
study the relationships among alcohol and marijuana use over time and investigate the existence of sub-populations.
I will probably need this approach to analyze my data, so just wondering if there is an alternative to Mplus.
Thanks
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Aivil
Joined: 03/14/2019
Associative Growth Mixture Model in OpenMx
Hello,
Is it currently possible to implement an Associative Growth Mixture Model in OpenMx? I was having a look at this paper from Hix-Small et al. (2004) where the authors are combining a multivariate LGM and a GMM to simultaneously
study the relationships among alcohol and marijuana use over time and investigate the existence of sub-populations.
I will probably need this approach to analyze my data, so just wondering if there is an alternative to Mplus.
Thanks
- Read more about Associative Growth Mixture Model in OpenMx
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