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Jeremy Miles posted on Saturday, November 27, 2004 - 12:31 am
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Hello, I was trying to run a model which had what Hayduk has called Phantom latent variables - these are latent variables that are unrelated to all other variables, and have no effect on the model. In other programs, I can just declare them, however in Mplus, this isn't possible (as I understand it). If I use a statement such as: phant by age @0; phant@1; I get model identification errors. Is there any other way to do this? Thanks, JM |
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bmuthen posted on Saturday, November 27, 2004 - 8:00 am
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Phantom variables work fine. Your statements are correct, so there must be something else going on. Please send input, output and data to support@statmodel.com. |
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Jeremy Miles posted on Saturday, November 27, 2004 - 8:14 am
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Ah! Sorry, I made a silly mistake. Thanks for the quick response. JM |
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Hi, I am attemptint to examine mediation using an APIM, specifying "k's" as phantom variables. However, I receive the NO CONVERGENCE error message when I attempt to run my model. My phantoms are specified: Pa1 by YBAL*-1 (ka1); Pa2 by PBAL*-1 (ka2); This has worked for me in the past, but will not converge (despite increasing iterations) for this model. Any suggestions? Thanks very much! |
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Please send the 2 outputs to Support - what worked and this one that didn't work. Also, please fill me in on why you use phantom variables, what APIMs are, and what "k's" are. |
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AT Jothees posted on Friday, February 23, 2018 - 2:08 am
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HI, I am performing multi group multiple cohort analysis with four cohorts observed in 6 time points. For one of my cohort group, there are no observations during the time point 1 and 2. Therefore, I created a phantom latent variable and specified a random manifest variable of my choice. But when I run the model I still getting the following error message. *** WARNING Data set contains unknown or missing values for GROUPING. Could you please tell me whether any reference from mplus handbook on how to create a phantom variable? Many thanks in advance. Regards J |
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See our FAQ Different number of variables in different groups |
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