OpenMx Help

I have had good experience with the Mx option THard=-n in Mx, also called Automatic Cold Restart. Is this option still available in OpenMx and, if not, why is it taken out?
Thanks for any answer in advance,
Han Oud

Is there anywhere to find the original scripts from the manual for OpenMx? When clicking on the links, each webpage is unavailable. Thanks for any redirection.

I am trying to get the confidence intervals for the free parameters in an ordinal ACE model. But it seems I screw it up. The range of confidence intervals is quite wide. So I have questions about confidence intervals in OpenMx.

How does OpenMx calculate the confidence intervals? I didn't get much information from 'OpenMx Manual' or 'OpenMx User Guide', but I found some in 'MxManual'. Are the principles of OpenMx and Mx same?

If it's just a silly code error, my code is below.

Any help would be appreciated!

univACEOrdModel <- mxModel("univACEOrd",
mxModel("ACE",

Hello,

First, thanks for providing such a useful software package!

Second, I am having some trouble getting my model to finish running, and since I have to manually stop the script, I don't get any helpful output that would help me debug. Please find attached my script.

Hi,

Thanks to the script below (suggested by Athanassios Protopapas and further developed by Paolo Ghisletta, thank you!!!) I was able to obtain a large number of fit indices, but I still don't know how to get (a) the 90% confidence interval for RMSEA, (b) p close (the test of the null hypothesis that RMSEA (in the population) in less than .05), and (c) the residual correlation matrix. Can anyone help me?

Latest versions and updates for OS, R and R Studio:

OS: Mac OS X 10.6.8
R: 2.14.1
RStudio: 0.95.261

When trying to run the install command: source('http://openmx.psyc.virginia.edu/getOpenMx.R')

from the R prompt nothing happens after it loads the tcltk interface:

> source('http://openmx.psyc.virginia.edu/getOpenMx.R')
Loading required package: tcltk
Loading Tcl/Tk interface ...

and when running the install command from the R prompt in RStudio I get a tcltk interface but when I clock the "OK" button under the choice of sequential/multicore choice buttons nothing happens.

Attempting to download to R 2.14.1, I receive the following message. New to R, so I'm pretty sure it's a simple error on my part...

> source('http://openmx.psyc.virginia.edu/getOpenMx.R')
Error in file(filename, "r", encoding = encoding) :
cannot open the connection
In addition: Warning message:
In file(filename, "r", encoding = encoding) :
unable to resolve 'openmx.psyc.virginia.edu'

Any help would be much appreciated.
Thanks

I realize I am asking for instability using development versions, but thought I would mention that running an OpenMx model kills R.

Here is my system info:

R Under development (unstable) (2012-02-03 r58258)
Platform: x86_64-pc-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:

I have just got this error message. What I have done is

1. define a model say, A, which includes sub-models.
2. define A0<-mxModel(A, name="A0")
3. add a suffix "0" to all parameters in A0, so that A and A0 are exactly the same but with independent parameters
4. define a bigger model M<-mxModel("M", A, A0, some constraints and objective function over A and A0)

Hi,

I am trying to install OpenMx on a linux red-hat 64 bit system, but I get an error message (see summary below and full output in attached file). I have tried this under R version 2.12.2 and also the latest R version R 2.14.2.
The same error message occurs when installing from the source.
Can you help?

Thanks in advance,
Rachel

> source('http://openmx.psyc.virginia.edu/getOpenMx.R')
trying URL 'http://openmx.psyc.virginia.edu/packages/src/contrib/OpenMx_1.2.0-1926.tar.gz'
Content type 'application/x-gzip' length 7212786 bytes (6.9 Mb)
opened URL