R Functions and User Interface

a place to discuss mxConstraint

A place to discuss mxRun

At the developer meeting today, we discussed adding checkpointing functionality to OpenMx.

This is basically a recovery system in case the computer crashes during an optimization. Essentially, the back-end will write a file to disk every x minutes or every z iterations. The file will contain some representation of the state of optimization at the time it saved. That way if the power fails or the computer crashes, the state of not-too-long-ago is saved somewhere, and the optimizer can pick up where it left off.

Hi,
I have attached a bivariate ACE two group twin model script.

I don't seem to be getting the expected behavior when attempting to drop paths using mxMatrix

If i try and fix the cells of the 'e' matrix to zero, I get the error

 # ERROR in paste("The job for model", omxQuotes(flatModel@name), "exited abnormally with the error message:",  : 
 # cannot coerce type 'char' to vector of type 'character'

A place to discuss mxFIMLObjective(covariance, means, thresholds = NA)

A place to discuss models current and desired og fit, df, AIC, etc and how to make basic functionality happen

How desirable is it that we continue to support matrix and algebra substitution. Matrix substitution will take a 1 x 1 matrix with name 'foo', and then any other matrix with the fixed parameter named 'foo' will get the value stored in the 'foo' matrix. Algebra substitution will take a 1 x 1 matrix with name 'foo', and then any other matrix with the fixed parameter named 'foo' will get the value computed by the 'foo' algebra. This idea is completely orthogonal to constant substitution and free parameter substitution.