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OpenMx 2.0 Discussion

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Picture of user. bwiernik Joined: 01/30/2014

Zero-inflated poisson counts using mxThreshold

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OpenMx 2.0 Discussion
I'm working with a latent variable model and I'd like to predict a negative binomial count response variable. I found the clever cludge that @AdminRobK previously shared to use thresholds fixed to parametric quantiles for negative binomial distribution ([#7856](https://openmx.ssri.psu.edu/comment/7856#comment-7856); [180313.R](https://openmx.ssri.psu.edu/sites/default/files/180313.R) ). I think this approach will work well for me. The issue I've got is that my dependent variable is clearly zero-inflated.
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No user picture. shufai Joined: 10/08/2020

mxCI results in 2.18.1 and 2.19.1 are different

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OpenMx 2.0 Discussion
I found that the confidence interval computed by adding mxCI in 2.19.1 are different from those in 2.18.1.

This is the code from the example of mxCI:


# From the example of mxCI()

# generate data
covariance <- matrix(c(1.0, 0.5, 0.5, 1.0),
nrow=2,
dimnames=list(c("a", "b"), c("a", "b")))

data <- mxData(covariance, "cov", numObs=100)

Posted on
No user picture. Kwabenaaaddo Joined: 02/01/2021

help: "Cov" is not positive definite.

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OpenMx 2.0 Discussion
Hello Mike,

Thank you for your awesome software. I have been working on a TSSEM and once I run my attached codes on the data in the excel file attached, I get the message below after the first stage regression is completed:

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Picture of user. Zhenzhen Joined: 12/14/2020

In the ACE Model:warning messages during my data analysis

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OpenMx 2.0 Discussion
Dear developer:

When I use ACE model to calculate heritability，I got a warning messages during the analysis（See Attachment）. Is there a problem with my data and will it affect the results?
when there was a warning message, I found that the estimated results will change under different start values.

Could you please provide me more details?
Thank you very much.

Best regards,
Zhenzhen Luo

Posted on
Picture of user. Zhenzhen Joined: 12/14/2020

In the ACE Model:warning messages during my data analysis

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OpenMx 2.0 Discussion
Dear developer:

When I use ACE model to calculate heritability，I got a warning messages during the analysis（See Attachment）. Is there a problem with my data and will it affect the results?
when there was a warning message, I found that the estimated results will change under different start values.

Could you please provide me more details?
Thank you very much.

Best regards,
Zhenzhen Luo

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No user picture. khusmann Joined: 08/11/2019

checkpoints in tryHard

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OpenMx 2.0 Discussion
Hi all,

I'm running large-ish models with mxTryHard, but notice checkpoints aren't an option as with mxRun. Is there still a way to save / load progress as I go?

Thanks!

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No user picture. iembry Joined: 05/31/2020

povRAM error - can't install OpenMx on GNU/Linux Distribution (R 4.0.0)

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OpenMx 2.0 Discussion
Hi, I recently attempted to update to the newest OpenMx release on R 4.0.0 on a GNU/Linux Distribution (Ubuntu-based) and the installation was unsuccessful.

I am only including the part of the installation process with the error message below:

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No user picture. Benny Joined: 05/15/2020

getOpenMx.R with R 4.0.0

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OpenMx 2.0 Discussion
Hello,
I am trying to install OpenMx with the NPSOL-optimizer with R 4.0.0 using the <% source('https://openmx.ssri.psu.edu/software/getOpenMx.R')%>-command (See [here](https://openmx.ssri.psu.edu/installing-openmx)). While the CRAN-version works fine, trying to install the NPSOL-version gives me the following error:

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No user picture. Gunnar Joined: 02/21/2019

saving confidence intervals to a separate file

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OpenMx 2.0 Discussion
Hello, in asimulation loop I want o to save results for instance confidence intervals for each run in separate file. Hos to do this is rather easy in eg.g. lavaan buit I have trouibles as newbie to find out how to specify the matrix cells for the parameter values i want to save. An example from Jaks book on Meta SEM:

pathmodel= mxModel(title,obs,matrixB,matrixP,matrixI, Ind_pos,Ind_neg,conf,algebraS,exp,fit)
pathmodelOut = mxRun(pathmodel, intervals = TRUE)

# retrieve the output
summary(pathmodelOut)

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No user picture. yaning Joined: 04/12/2019

Warning message

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OpenMx 2.0 Discussion
Hello, I want to run a G*E model (2 binary variables ) using the script from “JuanJMV”(https://openmx.ssri.psu.edu/node/4324). Unfortunately, there seems to be some errors in my model

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