OpenMx Help
AdminRobK
Joined: 01/24/2014
Please read before posting: Help us help you!
If you are posting to ask for help with installing OpenMx, please understand that it is difficult for anyone to help you out if you don't provide a few key pieces of information! We therefore ask that your post include, at minimum, the following:
AdminRobK
Joined: 01/24/2014
Please read before posting: Help us help you!
If you are posting to ask for help with an error message, we ask that your post include, at minimum, the following:
- The actual text of the error message.
- The version of OpenMx you're running (enter
mxVersion()at the R prompt). - The version of R you're running.
- Your operating system and architecture (e.g., "x86_64 Linux").
- OpenMx's default optimizer (which will always be NPSOL for OpenMx versions 1.4 or older).
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mspiegel
Joined: 07/31/2009
Staying informed with OpenMx
The easiest way to keep up with the latest changes to the OpenMx software is to subscribe to receive email notification of any news updates. Assuming that you are logged in, click on the "My account" link on the left-hand panel of your screen. Next click on "Subscriptions" and then "Content types". Enable the checkbox for "News" and click on "Save". Once you have followed these steps, you will start receiving an email whenever something is posted under the "Recent News" section of the website (the top left panel, underneath the Guinea Pig).
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mspiegel
Joined: 07/31/2009
General strategies
- Use the traceback() function in R after an error occurs.
It will print out the sequence of function calls that lead to the error. - Simplify your code. This may help you locate an error more easily. For example, replace the following:
foo <- mxModel(mxMatrix('Full', 1, 2, name = 'a'), mxAlgebra(a + a, 'b'), mxAlgebraObjective('b'))with:
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Steve
Joined: 07/30/2009
Welcome to the OpenMx General Help Forum
This forum is designed for general questions about how to use OpenMx. If you can't find another place where your question fits, then this is the place to be!
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cffalk2
Joined: 10/06/2025
mxComputePenaltySearch
Happy to see this implemented (thank you!). Questions about how it works. I've seen the vignette here: https://cran.r-project.org/web/packages/OpenMx/vignettes/regularization.html
But, that includes use of mxPenaltySearch. The one above (but not mxPenaltySearch) has an option to change ebicGamma, which is desired. I don't see documentation or examples for mxComputePenaltySearch, but would guess it could form part of a custom compute plan.
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Manuel Rein
Joined: 04/01/2024
Vivian
Joined: 04/30/2025
IvanVoronin
Joined: 08/18/2013
Mixed effects model - matrix specification
Hello,
I am looking for advice with regard to the implementation of mixed effects model in OpenMx.
I am starting with a simple model where one dependent variable Y is predicted by four correlated variables X1-X4. The participants in the sample are clustered in pairs (they are twins).
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econnon
Joined: 10/03/2024