umx
mxTryHard attempts in umx
I appreciate it!
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umxACEv vs umxSexLim
Thanks as always!
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umxACEv - twin variance component
I was wondering if the umxACEv function allows the extension of the twin design to include the twin variance component, T? Thanks a lot!
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Not getting rA with umxACEv and a warning
I'm using umxACEv to check correlations between ACE components of 4 characteristics.
The model runs without a problem, and I get correlations for C and E components, but not for A, and I get the following warning:
Warning message:
In sqrt(I * A) : NaNs produced
I don't see something suspicious with the A std paths so I have no idea how to start finding out what might be the problem and would appreciate your help!
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umxACE, same/different sex twins
We are fitting twin ACE models (and hopefully later twin ACE Cholesky models) using Finnish register data with no information on twin's zygosity, relying on same/different sex identification approach. This seems to be pretty straightforward with OpenMX but we have not found a way to do it with umxACE. Presumably, this is something that could be achieved with umxModify by changing paths but we were not able figure out how and were not able to find any examples either. Any suggestions how to proceed?
Best, Jani
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Can umx asses a genetically-informative cross-lagged twin model?
I would like to assess a genetically-informative cross-lagged twin model (e.g., a model like in Burt et al., 2005- "How are parent-child conflict and childhood externalizing symptoms related over time? Results from a genetically informative cross-lagged study").
umxACE with summary data
I'm trying to do something rather simple - a univariate ACE model (using umxACE) with summary data (either correlation or covariance), but until now I used only raw data. I saw in the documentation this possibility is supported by umxACE, however, I can't seem to make it work.
I've tried several options attached below (mzCorDF - the correlation as a data frame, mzCorMatrix - the correlation (or covariance) matrix of twin 1 and twin 2 of the trait.
What kind of input the function expects for it to understand it is summary data?
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umxCP with two latent variables that loads in only part of the indicators
This is the first time I am playing with real data, and since I understand lavaans syntax better than openMx's I decided to start with umx.
I am trying to specify a CP model with two latents, but my measured indicators represents parenting style and personality (big5), 10 variables in total. See fig 1. I think they are better conceptualized as two latents that can correlate, but only loads in part of the variables, the five personality traits and the five parenting styles.
umxGxEbiv with 2 moderators
I'm interested in the moderation effect of an interaction between two moderators on a phenotype of interest. umxGxEbiv is fantastic for one moderator, but does not accept two moderators, even though the Purcell model allows it. Is there a way to use umcGxEbiv with two moderators (and thus estimating their interaction effect as well)?
Thanks!
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Changing attributes of the plot in umxGxEbiv
Is there a way to control things in the appearance of the plot that comes with umxGxEbiv? Mainly I would like to change the legend size, line colours and maybe adding dots.
Thanks!
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