OpenMx Help
blazej
Joined: 11/20/2018
Help in translating a longitudinal path model to OpenMx SEM syntax
Greeting everyone!
As I'm new to SEM (in general) and OpenMx I would like to ask you for some help in specifying the model in question properly.
I'm trying to reproduce results for a 3 time points path model where specific indirect effects where of interest. The original model was depicted as in attached image.
rranne2@uic.edu
Joined: 12/10/2018
unexpected string constant error message in mxModel
Hi there,
I'm looking at how neuroticism ("per_neurot_y1f") predicts later change in symptoms of anxiety (from Time 1 to Time 3). I'm not sure why I'm getting this error message about this particular string of my model. Here's my code.
manifests <- c("Time1newanxiety", "Time3anxiety", "per_neurot_y1f")
latents<-"F1"
rranne2@uic.edu
Joined: 12/10/2018
latent difference score issues
Hello,
- Read more about latent difference score issues
- 3 comments
- Log in or register to post comments
Veronica_echo
Joined: 02/23/2018
Error message of mxTryhard() with NPSOL optimizer
Hi everyone,
I installed OpenMx2.11 thought source('https://openmx.ssri.psu.edu/software/getOpenMx.R') and wanted to switch optimizer by mxOption(NULL,"Default optimizer","NPSOL"), but I got error message
Error in runHelper(model, frontendStart, intervals, silent, suppressWarnings, :
NPSOL is not available in this build. See ?omxGetNPSOL() to download this optimizer
I also had the same error message when I tried to use cluster to run the model.
How can I fix it? Any advice would be appreciated!
blazej
Joined: 11/20/2018
Looking for help with including a moderator to a path model
Greetings,
this is my 1st post, so please forgive me if this is offtopic.
In sort of new to SEM / modelling in general. So far I managed to make some sense of lavaan() syntax in R, to run a path model like this (file attached).
Before introducing the W moderator (continuous) this model was specified (in lavaan) as:
model <- '
X1 ~~ X2
A ~ X1 + X2
Y ~ A'
All variables are observed and continuous.
Veronica_echo
Joined: 02/23/2018
Error message when using get() to return values of OpenMx object
Hi everyone,
I am trying to return values of an OpenMx object from optimized mxModel by get() (more details could be found in attached). Is there any other way to return the value of an OpenMx object by string? Thanks in advance.
Julia
Joined: 03/29/2012
Parameter contraints across subgroups
Hi all,
- Read more about Parameter contraints across subgroups
- 3 comments
- Log in or register to post comments
lior abramson
Joined: 07/21/2017
the continuous part of the model is not positive definite
Hello,
I would like to ask your help with an error message that I cannot figure out.
First, some general details about my openMx version:
OpenMx version: 2.7.17 [GIT v2.7.17]
R version: R version 3.4.4 (2018-03-15)
Platform: x86_64-w64-mingw32
Default optimiser: CSOLNP
NPSOL-enabled?: No
OpenMP-enabled?: No
I am trying to do a bivariate Cholesky model with paths specifications, with a syntax that worked before...
For some reason I get the following error message:
Veronica_echo
Joined: 02/23/2018
Error message for mxCompare() with boot = T
Hi,
I want to compare a 2-class growth mixture model to a latent growth curve model in individually-varying time points framework (i.e., definition variables), and here is the code and error message and OpenMx version:
- Read more about Error message for mxCompare() with boot = T
- 21 comments
- Log in or register to post comments
Veronica_echo
Joined: 02/23/2018
Remove path from an existed model
Hi all,
I would like to remove one factor, say "IQ2", from a CFA (script is below). Does it work if I rewrite the model as
cfa2 <- mxModel(cfa, "one factor", mxPath(from = "Q2", to = "Q2", arrows=2, values = 0, free = F),
mxPath(from = "Q1", to = "Q2", arrows=2, values = 0, free = F),
mxPath(from = "Q1", to = observed, free = F, values = 0)
)
Is there any more convinience way to remove path?
Thanks in advance!
- Read more about Remove path from an existed model
- 2 comments
- Log in or register to post comments