Re: [R] how to construct an index or classify the cases with the combination of categorical and continuous variables

From: Dimitris Rizopoulos <dimitris.rizopoulos_at_med.kuleuven.be>
Date: Tue 06 Dec 2005 - 04:11:46 EST

there are possibilities to analyze such kind of data under an IRT framework, e.g., look at

Moustaki, I. (1996). A latent trait and a latent class model for mixed observed variables. British Journal of Mathematical and Statistical Psychology, 49

Moustaki, I. and Knott, M. (2000). Generalised Latent Trait Models. Psychometrika, 2000, 65, 391-411

I hope it helps.

Best,
Dimitris



Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

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>I have such a dataset.
> x1 x2 x3 x4
> 1 1 0 2
> 0 1 1 10
> 1 0 1 30
> ......
>
> x1,x2,x3 are categorical variable(the value can be 0 or 1),and x4 is
> a continuous variable.
> x1,x2,x3,x4 is the manifest(measurable) variables which reflect one
> immeasurable variable.
> If all of x1-x4 are continuous variables,I can do factor analysis to
> extract the immeasurable "variable",but some of them are categorical
> variable which violate the assumptions of factor analysis.So is
> there anyway to extract the immeasurable "variable" or construct an
> index based on these variable?
>
> If NOT,then is there any way to classify the cases in to two
> categories? If all the variables are binary,I can use latent class
> analysis to do it,but how about binary variables plus countinuous
> variables?
>
> It is not a R question,I just want some one help me out!
> Thank you !
>
>
> 2005-12-06
>
> ------
> Deparment of Sociology
> Fudan University
>
> My new mail addres is ronggui.huang@gmail.com
> Blog:http://sociology.yculblog.com
>
>


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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Dec 06 04:31:43 2005

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