bi- or multi-variate twin model script for OpenMx?

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tbates's picture
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Joined: 07/31/2009

Are there multivariate Twin scripts for pathic and/or matic scripts available to work with?

neale's picture
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Joined: 07/31/2009
Not as far as I know.

Not as far as I know. However, the advent of lower triangular matrices should make it a snap to modify UnivariateTwinAnalysis_Matrix.R to a Cholesky, and the algebras for common and independent models are very straightforward. Sex-limitation scripts will be a bit more challenging as there are several choices to be made.

tbates's picture
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Joined: 07/31/2009
OK. Made and commited a

OK. Made and commited a fairly expandable 2-group multi-variate script

A trunk/demo/TwinAnalysis_Multivariate_Matrix_Raw.R

Comments welcome. It would be good to add mx comparison checks, then add some path dropping and fit-change code.

Look forward to seeing those 5-group sex limitation models :-)