OpenMx - Advanced Structural Equation Modeling

This is the community Wiki for the OpenMx project.

Full list of all pages on the wiki

Publications About or using OpenMx

Tips and FAQTs

• FAQ
• Common Errors (and some less common ones)
• HOWTOs
• Helper functions

Tutorials

• The documentation
• Example Models from users
• Online-tutorials
• SEM Concepts
• Simplified manual for beginners
• OpenMx for mx 1.x users
• OpenMx for Mplus users
• OpenMx for Amos users
• OpenMx for R users

OpenMx Function and Object Reference

The Main OpenMx Functions

• mxModel() Container for all the parts of a model
• mxData() Provides the data for a model
• mxMatrix() An openmx matrix with labels, values...
• mxAlgebra() Create named algebras for use in a model
  • Operators and functions
  • Operator precedence
• mxObjective Set the likelihood target of a model
• mxRun(model, intervals=F,…) Core function to run a model, get CIs etc.
• mxCI() Include this in a model to request confidence intervals
• mxCompare() Outputs a nice table comparing the fit of different models
• mxEval() Evaluate an algebra
• mxConstraint() Constrain values within a model
• omxGetParameters(model, indep=F) A helper to get all the free parameters from a model
• omxSetParameters(model, labels…) A helper for setting labels, values etc.
• omxAssignFirstParameters(model,…) Helper to equate the start values for all instances of a label.
• omxGraphviz(model, dotFilename) Makes a path diagram from your model!

omx Functions

omxParallelCI
omxQuotes
omxRAMtoML
omxSelectCols
omxSelectRows
omxSelectRowsAndCols

Development

• Binary release policy
• Setting up Swift (parallel environment)
• Installing alternative BLAS libraries
• Writing a Demo Script
• Generating Simulated Data
• Performance testing
• Projects under development

Footnotes

Can’t see what you want? Click here to create a new wiki page.

Registered users of forums can create pages here explaining SEM issues. Wikipedia maintains a page on Structural Equation Modeling, it is not, however, a how-to guide, no an in-depth examination, and we expect the SEM community will dive into very specific issues here.