OpenMx Help
Lisdin
Joined: 03/08/2016
Unable to install OpenMx with NPSOL
Hi!
I have been trying to install the OpenMx Team's build of OpenMx with the NPSOL optimizer, using the following line as per instructions (https://openmx.ssri.psu.edu/installing-openmx):
source('https://vipbg.vcu.edu/vipbg/OpenMx2/software/getOpenMx.R')
I have tried several times and with several R versions (4.1.3, 4.2.3, and 4.3.1), but I always get the warning that the package ‘OpenMx’ is not available as a binary package for this version of R (see full warning message attached).
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Veronica_echo
Joined: 02/23/2018
Trouble with importing specific functions from OpenMx into my package
Hello OpenMx community,
I am currently developing an R package called nlpsem, and I am trying to use some functions from the OpenMx package. Specifically, I am trying to use the mxOption and imxReportProgress functions. However, I am encountering some issues when trying to use these functions without explicitly loading the OpenMx package with library(OpenMx).
In my DESCRIPTION file, I have the following lines:
Imports:
OpenMx, ggplot2, dplyr, tidyr, stringr, Matrix, nnet, readr, methods
jkraemer
Joined: 12/18/2022
goodness-of-fit indices for ML SEM
I have been asked by a reviewer to offer a better justification for the fit of my proposed ML model by "indicating the fit of the within and between model separately". After reading several chapters made for MPlus, I first looked to mxRefModels(). But, I am under the impression that it does NOT work with ML SEM. So, I tied to make the saturated and independence models for within and between myself for the various calculations. I was successful regarding the independence model but not the saturated model.
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Ben
Joined: 06/20/2023
Best Practices for 3lvl measurement SEM
I'm currently building a 3lvl MSEM including measurement models. The Pritikin et al. (2017) paper is relevant and helpful but whereas they have observed variables on every level, I mainly want to use levels to control for the between-part of the variance of items I measured only on the 1st level. Hence, I want to make sure I don't misclassify my model (see below). Assuming the model is right, I'm also grateful on tips how to deal with a non-convex Hessian when trying to fit it.
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Ben
Joined: 06/20/2023
Error message when searching two words or phrase in OpenMx Forum
This is a bit meta, but when I search for more than a single word using the search function on this website or the advanced search function of the forum (restricted to the forum), I get an error message:
"Forbidden
You don't have permission to access /search/node/TERM1 TERM2 on this server."
Google doesn't seem to search the posts itself but only the forum overview.
gkirk
Joined: 10/24/2022
build fails fastLm.o
trying to install OpenMx with install.packages("OpenMx")
fails for RcppEigen with make fast.Lm.o error 1
machine is Scientific Linux version 7.9 (Nitrogen)
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Ben
Joined: 06/20/2023
Problems with non-convex Hessian with multilevel SEM
As written in this thread, I have repeated problems with a non-convex Hessian while working my way step-wise towards a 3-level SEM with latent variables and their respective measurement items in a paper in organizational psychology.
While I'm looking for general guidelines to deal with non-cenvex Hessians and status code 5-issues in that thread, it's probably good to look at my models to find issues here.
Ben
Joined: 06/20/2023
General strategies to deal with non-convex Hessian matrix
Hello everyone!
I am working on a org psych paper that is currently under review. **The model** is a quite complex *multilevel mediation SEM*, featuring *four latent variables* (only one is exogenous/independent, the others are endogeneous mediators/outcomes). I also include the *measurement models* for each variable (i.e., the respective items as manifest variables). Until now I have done the estimations in a 2-level model using lavaan. For the review I am trying to add a third level to control for further nestedness.
lf-araujo
Joined: 11/25/2020
Announcing umxCLPM() TESTERS NEEDED
Hi all,
All I really want is another single-author paper complaining about cookie-cutter models, so I wrote the ultimate cookie-cutter (\s) for CLPM:
https://github.com/tbates/umx/commit/26a9cf01da4cc789be3fc66ddf16ab40050cf87d
It is hard to find spect details for some of these models on the original papers, so I need testers. In particular, I wonder whether the 'uv' correlation is really equated across in Heise's and in STARTS. I believe it is fixed for Hamaker's.
Enjoy.
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lf-araujo
Joined: 11/25/2020
Adding thresholds to model using umxThresholdMatrix
Hi all,
I am trying to add ordinal variables to the mrdoc model. I can't understand the proper way of setting this up using umxThresholdsMatrix. It seems OpenMx is complaining about the autonaming of the parameters:
Error: The thresholds matrix associated with the expectation function in m
odel 'MZ' contains column names and the expectation function has specified
non-identical threshnames.
Here is the MWE:
library(umx)
library(dplyr)
library(ggplot2)