OpenMx 1.3

Since we were cleaning up the saving and loading of models (see http://openmx.psyc.virginia.edu/thread/1385), on a related matter I decided to support anonymous free parameters in the utility functions omxGetParameters() and omxSetParameters(). Anonymous free parameters (free parameters that have a label of 'NA') are now identified by the string "modelname.matrixname[row,col]". This notation will be available as input to the function omxSetParameters(), which currently rejects anonymous free parameters. The following demo will work in OpenMx 1.3.

We have been receiving feedback from OpenMx users using save() and save.image() to save the state of a MxModel into a file on disk. There have been problems associated with saving a model from an older version of OpenMx and attempting to load the model into a newer version of OpenMx. save() and save.image() store the internal representation of OpenMx objects, which may change across different versions of OpenMx.