OpenMx 2.0 Discussion

Hi,

I get an update of OpenMX from 2.5.2 to 2.6.7 but the updated version would not compile, these are the errors:

In file included from /usr/lib/R/library/StanHeaders/include/stan/math/rev/mat.hpp:56:0,
from /usr/lib/R/library/StanHeaders/include/stan/math.hpp:4,
from omxMLFitFunction.cpp:19:
/usr/lib/R/library/StanHeaders/include/stan/math/rev/mat/functor/cvodes_utils.hpp:4:27: fatal error: cvodes/cvodes.h: No such file or directory
compilation terminated.
/usr/lib/R/etc/Makeconf:141: recipe for target 'omxMLFitFunction.o' failed

I'm trying to install the latest version of OpenMx. I'm running R 3.0.1. I keep getting an error message that says "package 'OpenMx' is not available for (for R version 3.0.1)". Can anyone help?

Thanks, Carol

Is anyone aware of anyway one can change/respecify the null models for obtaining incremenrtal fix index measures in OpenMx.

My current plan to accomplish this is to fit alternate baseline models separately and to use the chi-square values from the modified baseline models to calculate the incremental fit index values.

I am trying to get the confidence intervals for the ACE model, but for some reason they are not showing up in OpenMX version 2. I have been advised to try and run the model in OpenMX version 1.4 so I have been changing some functions in my code to make it compatible.
So far I changed mxExpectationNormal to mxFIMLObjective; and mxFitFunctionAlgebra with mxAlgebraObjective based on what i've found online.
I am still getting one error as follows:
"Error: could not find function "mxFitFunctionML"
Could you please advise how I should edit my code for it to work in OpenMX version 1.4?

Hi,

I have a script which runs ok but the main problem is the confidence intervals. For ACE and AE model CI's are the same.

I would greatly appreciate if you could see attached for the codes - I think there might be an error for the CI for the nested model.

Many thanks

Hi
I have R program {R version 3.1.1 (2014-07-10)}.
But I am not able to run Open Mx.
How do I check if R program is installed and ready to run Open Mx?
I would be glad if you could help me to run Open Mx.

Thanks in advance
Bhavana.B
bhvn10@gmail.com

I'm experimenting with OpenMx's capabilities to calculate the information matrix (and standard errors) in the context of IFA models with priors on some item parameters. e.g., see for example, the 3PL model in the documentation: http://openmx.psyc.virginia.edu/docs/OpenMx/latest/ItemFactorAnalysis.html#a-3pl-with-bayesian-priors

Say one does the following changes to the example inside mxComputeSequence (e.g., see also end of attached code):
Remove mxComputeNumericDeriv()
Add mxComputeOnce('fitfunction', 'information', "sandwich")

Is anybody aware if there are any issues with OpenMx and windows 10? I just got a report of a problem with ctsem - user says there were no problems previously on windows 7 and 8 systems.

I'm experimenting with some novel item models for use with OpenMx's item factor analysis capabilities. I was wondering what optimization methods are currently available (e.g., for the M-step when doing Bock-Aitkin EM), and which one(s) can make use of analytical derivatives (which tend to be faster, at least in my experience).