OpenSEM Forums
JuanJMV
Joined: 07/20/2016
Doubt with confidence intervals
Hello,
I am very new with open Mx and I need a little bit of help.
I am doing a bivariate model with the generic scripts of Boulder. I need to know how could I get the confidence intervals for the rg,rc,re.
Thank you everyone in advance.
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JBosdriesz
Joined: 03/07/2017
Multiple imputation
Hello,
We are just beginning to work with OpenMx to study behavior in relation to genetic and environmental components in twins. In our dataset we have a fairly large number of missing values (checks showed they are missing at random). Normally we would opt for multiple imputation in SPSS and run our analyses on the separate imputed datasets, while also presenting a pooled analyses. But because of the behavioral genetics component, we want to use OpenMx for our analyses.
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fife
Joined: 07/01/2010
MxComputeGradientDescent: fitfunction is not finite error
Hi all,
I'm currently attempting an ordered SEM model with FIML. I'm having an "MxComputeGradientDescent: fitfunction mindfulness.fitfunction is not finite" error. I can't figure out what's wrong. The warning message says something about starting values, but they all seem reasonable. Can anyone find an error?
MAchterberg
Joined: 02/20/2017
ACE model error: In model 'ACE' Optimizer returned a non-zero status code 6.
Hello,
I am quite new to behavioral genetic modelling and I have a question about an error that I am receiving since the OpenMX update.
I have used the same scripts as before the update, but my results are very different.
in addition, I now get the error:
In model 'ACE' Optimizer returned a non-zero status code 6. The model does not satisfy the first-order optimality conditions to the required accuracy, and no improved point for the merit function could be found during the final linesearch (Mx status RED)
JuliaJoplin
Joined: 10/12/2014
Bivariate Cholesky - Continuous & Ordinal, with Covariates
I still consider myself a BG novice, and just when I think I've gone as deep as I'll ever go, something else comes along! Awhile ago, the folks on this board graciously helped me do a bivariate Cholesky decomposition of two variables (caster and ogo). The two variables were assessed at different time points, so one variable needed to be adjusted for age1 and sex, the other variable for age2 and sex. We came up with a successful script (attached).
bwiernik
Joined: 01/30/2014
Latent variable Cholesky ACE model--Singular A and C matrices
I'm running a model with a Cholesky decomposition on a set of latent variables for the Big Five trait. When I run the model, the estimated phenotypic covariance (A+C+E) matrix among the latent variables Big Five variables and the E matrix are fine, but the A and C matrices are both singular. The diagonal elements of C are all near zero, so I'm not surprised by that one. Several of the estimated genetic correlations for A are extremely high (.80-.90).
Liz
Joined: 04/20/2016
Modify the Script of Common pathway model
Dear all,
Now I'm testing a model with one observed factor and one latent factor which containing two observed factor. I'm modify a Script with two latent factors as follow (path setting part):
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torkildl
Joined: 01/31/2017
OpenMx Behavior genetics example scripts
I am looking for sets of example scripts. I have een posts for Mx examples in this forum, but not OpenMx examples.
More specifically, I am looking for scripts that estimate models With nuclear twin family designs, but also other designs are interesting.
Are there such Collections available on the internet?
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mistral
Joined: 01/20/2017
Adding siblings to saturated categorical model
Hello everyone,
I have a saturated model for categorical data with 4 categories (3 thresholds) the model is running ok for twin 1 and twin 2, but when I try to add siblings into the model I get the following error:
Error: In model 'baseModel' I was expecting 3 thresholds in column 'vars1' of matrix/algebra 'MZf.expThreshfMZ' but I hit NA values after only 0 thresholds. You need to increase the number of thresholds for 'vars1' and give them values other than NA
Noandria1
Joined: 01/06/2017
ACE Model
Hey guys. I am trying to do an ACE Model with my own twin data for my master thesis.
So far I had not a lot to do with statistics and also the Program R was new for me, so I spent a lot of time to get into the topic.
As basic skript I used http://openmx.psyc.virginia.edu/docs/OpenMx/2.6.7/GeneticEpi_Matrix.html
I have some questions for you and hope someone can help me with them.
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