
i am working with the same data with the two sem functions in packages lavaan and sem
the manner how  description of the model are differnt for  the the funcion in sem 
and the function sem in  lavaan
 
Thanks a lot 

Antra EL MOUSSELLY 


 


Date: Mon, 28 Mar 2011 12:33:46 -0700
From: ml-node+3412819-419762937-225466@n4.nabble.com
To: antrael@hotmail.com
Subject: Re: Structural equation modeling in R(lavaan,sem)

On 28 March 2011 09:00, jouba <[hidden email]> wrote: 

Your syntax is not very tidy. That makes it hard to check. 


> x1 <->x1, sigmma7, NA 
> for me this  an exogen variable and i am not obliged to specify this 
> equation 
> 
> model.se<-specify.model() 
> x1->x2,gamm1,NA 
> x2->x3,gamm2,NA 
> x3>x4,gamm3,NA 
> 

That's probably wrong. 


> x4->x5,gamm4,NA 
> x7->x6,gamm5,NA 
> x6->x5,gamm6,NA 
> 

Are the above two correct? 


> x2 <->x2 ,sigmma1,NA 
> x3 <->x3 ,simma2,NA 
> x4 <->x4 ,sigmma3,NA 
> x5 <->x5 ,sigmma4,NA 
> x7 <->x7 ,sigmma5,NA 
> 
x6 <->x6 ,sigmma6,NA 
> 
> 

It's a somewhat unusual looking model. What are you trying to do? 

Jeremy 


-- 
Jeremy Miles 
Psychology Research Methods Wiki: www.researchmethodsinpsychology.com 

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