It would be nice to have an mxSaturatedModel helper function. A draft of one is checked in, but it is untested and requires some revision.
http://openmx.psyc.virginia.edu/thread/1852
OpenMx has a new feature for beta testing available in the trunk for users who build OpenMx from source. This feature is not included in the current (1.3.1) binary release, but will be available in an upcoming beta release.
The latest version of OpenMx 1.3 is available for download. OpenMx 1.3.1 contains a bug fix described below. For more information on OpenMx 1.3 features, see here. Use the installation command in an R terminal source('http://openmx.psyc.virginia.edu/getOpenMx.R').
We are pleased to announce the next major release of the OpenMx library. Use the installation command in an R terminal source('http://openmx.psyc.virginia.edu/getOpenMx.R'). There have been several minor enhancements to the OpenMx library interface (all changes are backwards compatible) and several performance improvements. We have implemented a dependency tracking system in the OpenMx backend. If an algebra is independent of all the definition variables in a FIML calculation, then the algebra is computed once per FIML iteration.
The latest version of OpenMx 1.2 is available for download. OpenMx 1.2.5 contains several fixes which are described below. For more information on the general features within the OpenMx 1.2 series, see here. Use the installation command in an R terminal source('https://openmx.ssri.psu.edu/getOpenMx.R') to install OpenMx 1.2.5.
The Onyx team is happy to announce the release of Onyx, a Structural Equation Modeling (SEM) Graphical User Interface designed to set up and fit SEMs intuitively and fast, ease the introduction of Structural Equation Models for beginners, and simplify the transistion to more complex SEM scripting languages. Onyx is developed in cooperation of the Mathematical Psychology Lab at UVa and the Formal Methods Project at the Max Planck Institute for Human Development. Onyx provides import from and export to OpenMx, a free SEM package for R.
The beta release of the OpenMx 1.3 series is available for download. Use the alternate installation command in an R terminal source("https://openmx.ssri.psu.edu/getNewOpenMx.R"). The new series of OpenMx is the result of nearly 3 months of development and much feedback from the user community.
From http://openmx.psyc.virginia.edu/thread/1443:
I wrote a simple OpenMx script to do LCA on ordinal variables. It works fine on simulated data. When I run it on real data, the estimated thresholds are not in order. I then included constraints on the thresholds (simple enough to do) so that they are monotonically increasing. This seems to work as the threshold estimates monotonically increase. From reading the manual, I was sure constraints weren't necessary.